diff --git a/docs/main/changelog.rst b/docs/main/changelog.rst
index 85847ea8..a558a5b3 100644
--- a/docs/main/changelog.rst
+++ b/docs/main/changelog.rst
@@ -7,6 +7,12 @@ that were made in every particular version.
 From version 0.7.6 *Dependency Injector* framework strictly 
 follows `Semantic versioning`_
 
+Development version
+-------------------
+- Add ``strict`` mode and ``required`` modifier for ``Configuration`` provider.
+  See issue `#341 <https://github.com/ets-labs/python-dependency-injector/issues/341>`_.
+  Thanks `ms-lolo <https://github.com/ms-lolo>`_ for the feature request.
+
 4.9.1
 -----
 - Fix a bug in the ``Configuration`` provider to correctly handle undefined values.
diff --git a/docs/providers/configuration.rst b/docs/providers/configuration.rst
index 496cb69d..40d7735a 100644
--- a/docs/providers/configuration.rst
+++ b/docs/providers/configuration.rst
@@ -143,6 +143,28 @@ With the ``.as_(callback, *args, **kwargs)`` you can specify a function that wil
 before the injection. The value from the config will be passed as a first argument. The returned
 value will be injected. Parameters ``*args`` and ``**kwargs`` are handled as any other injections.
 
+Strict mode and required options
+--------------------------------
+
+You can use configuration provider in strict mode. In strict mode configuration provider raises an error
+on access to any undefined option.
+
+.. literalinclude:: ../../examples/providers/configuration/configuration_strict.py
+   :language: python
+   :lines: 3-
+   :emphasize-lines: 12
+
+You can also use ``.required()`` option modifier when making an injection.
+
+.. literalinclude:: ../../examples/providers/configuration/configuration_required.py
+   :language: python
+   :lines: 11-20
+   :emphasize-lines: 8-9
+
+.. note::
+
+   Modifier ``.required()`` should be specified before type modifier ``.as_*()``.
+
 Injecting invariants
 --------------------
 
diff --git a/examples/providers/configuration/configuration_required.py b/examples/providers/configuration/configuration_required.py
new file mode 100644
index 00000000..6e77f27f
--- /dev/null
+++ b/examples/providers/configuration/configuration_required.py
@@ -0,0 +1,30 @@
+"""`Configuration` provider required modifier example."""
+
+from dependency_injector import containers, providers, errors
+
+
+class ApiClient:
+    def __init__(self, api_key: str, timeout: int):
+        self.api_key = api_key
+        self.timeout = timeout
+
+
+class Container(containers.DeclarativeContainer):
+
+    config = providers.Configuration()
+
+    api_client_factory = providers.Factory(
+        ApiClient,
+        api_key=config.api.key.required(),
+        timeout=config.api.timeout.required().as_int(),
+    )
+
+
+if __name__ == '__main__':
+    container = Container()
+
+    try:
+        api_client = container.api_client_factory()
+    except errors.Error:
+        # raises error: Undefined configuration option "config.api.key"
+        ...
diff --git a/examples/providers/configuration/configuration_strict.py b/examples/providers/configuration/configuration_strict.py
new file mode 100644
index 00000000..3922f450
--- /dev/null
+++ b/examples/providers/configuration/configuration_strict.py
@@ -0,0 +1,30 @@
+"""`Configuration` provider strict mode example."""
+
+from dependency_injector import containers, providers, errors
+
+
+class ApiClient:
+    def __init__(self, api_key: str, timeout: int):
+        self.api_key = api_key
+        self.timeout = timeout
+
+
+class Container(containers.DeclarativeContainer):
+
+    config = providers.Configuration(strict=True)
+
+    api_client_factory = providers.Factory(
+        ApiClient,
+        api_key=config.api.key,
+        timeout=config.api.timeout.as_int(),
+    )
+
+
+if __name__ == '__main__':
+    container = Container()
+
+    try:
+        api_client = container.api_client_factory()
+    except errors.Error:
+        # raises error: Undefined configuration option "config.api.key"
+        ...
diff --git a/src/dependency_injector/containers.c b/src/dependency_injector/containers.c
index 24f9125a..644a645d 100644
--- a/src/dependency_injector/containers.c
+++ b/src/dependency_injector/containers.c
@@ -872,7 +872,7 @@ struct __pyx_obj_19dependency_injector_10containers___pyx_scope_struct_5_copy;
 struct __pyx_obj___pyx_scope_struct____Pyx_CFunc_void____object___to_py;
 struct __pyx_opt_args_19dependency_injector_9providers_deepcopy;
 
-/* "providers.pxd":299
+/* "providers.pxd":301
  * 
  * 
  * cpdef object deepcopy(object instance, dict memo=*)             # <<<<<<<<<<<<<<
@@ -1091,11 +1091,12 @@ struct __pyx_obj_19dependency_injector_9providers_ConfigurationOption {
   PyObject *__pyx___name;
   PyObject *__pyx___root_ref;
   PyObject *__pyx___children;
+  int __pyx___required;
   PyObject *__pyx___cache;
 };
 
 
-/* "providers.pxd":104
+/* "providers.pxd":105
  * 
  * 
  * cdef class TypedConfigurationOption(Callable):             # <<<<<<<<<<<<<<
@@ -1107,22 +1108,23 @@ struct __pyx_obj_19dependency_injector_9providers_TypedConfigurationOption {
 };
 
 
-/* "providers.pxd":108
+/* "providers.pxd":109
  * 
  * 
  * cdef class Configuration(Object):             # <<<<<<<<<<<<<<
  *     cdef str __name
- *     cdef dict __children
+ *     cdef bint __strict
  */
 struct __pyx_obj_19dependency_injector_9providers_Configuration {
   struct __pyx_obj_19dependency_injector_9providers_Object __pyx_base;
   PyObject *__pyx___name;
+  int __pyx___strict;
   PyObject *__pyx___children;
   PyObject *__weakref__;
 };
 
 
-/* "providers.pxd":115
+/* "providers.pxd":117
  * 
  * # Factory providers
  * cdef class Factory(Provider):             # <<<<<<<<<<<<<<
@@ -1137,7 +1139,7 @@ struct __pyx_obj_19dependency_injector_9providers_Factory {
 };
 
 
-/* "providers.pxd":124
+/* "providers.pxd":126
  * 
  * 
  * cdef class DelegatedFactory(Factory):             # <<<<<<<<<<<<<<
@@ -1149,7 +1151,7 @@ struct __pyx_obj_19dependency_injector_9providers_DelegatedFactory {
 };
 
 
-/* "providers.pxd":128
+/* "providers.pxd":130
  * 
  * 
  * cdef class AbstractFactory(Factory):             # <<<<<<<<<<<<<<
@@ -1161,7 +1163,7 @@ struct __pyx_obj_19dependency_injector_9providers_AbstractFactory {
 };
 
 
-/* "providers.pxd":132
+/* "providers.pxd":134
  * 
  * 
  * cdef class FactoryDelegate(Delegate):             # <<<<<<<<<<<<<<
@@ -1173,7 +1175,7 @@ struct __pyx_obj_19dependency_injector_9providers_FactoryDelegate {
 };
 
 
-/* "providers.pxd":136
+/* "providers.pxd":138
  * 
  * 
  * cdef class FactoryAggregate(Provider):             # <<<<<<<<<<<<<<
@@ -1186,7 +1188,7 @@ struct __pyx_obj_19dependency_injector_9providers_FactoryAggregate {
 };
 
 
-/* "providers.pxd":143
+/* "providers.pxd":145
  * 
  * # Singleton providers
  * cdef class BaseSingleton(Provider):             # <<<<<<<<<<<<<<
@@ -1200,7 +1202,7 @@ struct __pyx_obj_19dependency_injector_9providers_BaseSingleton {
 };
 
 
-/* "providers.pxd":148
+/* "providers.pxd":150
  * 
  * 
  * cdef class Singleton(BaseSingleton):             # <<<<<<<<<<<<<<
@@ -1212,7 +1214,7 @@ struct __pyx_obj_19dependency_injector_9providers_Singleton {
 };
 
 
-/* "providers.pxd":153
+/* "providers.pxd":155
  * 
  * 
  * cdef class DelegatedSingleton(Singleton):             # <<<<<<<<<<<<<<
@@ -1224,7 +1226,7 @@ struct __pyx_obj_19dependency_injector_9providers_DelegatedSingleton {
 };
 
 
-/* "providers.pxd":157
+/* "providers.pxd":159
  * 
  * 
  * cdef class ThreadSafeSingleton(BaseSingleton):             # <<<<<<<<<<<<<<
@@ -1237,7 +1239,7 @@ struct __pyx_obj_19dependency_injector_9providers_ThreadSafeSingleton {
 };
 
 
-/* "providers.pxd":163
+/* "providers.pxd":165
  * 
  * 
  * cdef class DelegatedThreadSafeSingleton(ThreadSafeSingleton):             # <<<<<<<<<<<<<<
@@ -1249,7 +1251,7 @@ struct __pyx_obj_19dependency_injector_9providers_DelegatedThreadSafeSingleton {
 };
 
 
-/* "providers.pxd":167
+/* "providers.pxd":169
  * 
  * 
  * cdef class ThreadLocalSingleton(BaseSingleton):             # <<<<<<<<<<<<<<
@@ -1261,7 +1263,7 @@ struct __pyx_obj_19dependency_injector_9providers_ThreadLocalSingleton {
 };
 
 
-/* "providers.pxd":172
+/* "providers.pxd":174
  * 
  * 
  * cdef class DelegatedThreadLocalSingleton(ThreadLocalSingleton):             # <<<<<<<<<<<<<<
@@ -1273,7 +1275,7 @@ struct __pyx_obj_19dependency_injector_9providers_DelegatedThreadLocalSingleton
 };
 
 
-/* "providers.pxd":176
+/* "providers.pxd":178
  * 
  * 
  * cdef class AbstractSingleton(BaseSingleton):             # <<<<<<<<<<<<<<
@@ -1285,7 +1287,7 @@ struct __pyx_obj_19dependency_injector_9providers_AbstractSingleton {
 };
 
 
-/* "providers.pxd":180
+/* "providers.pxd":182
  * 
  * 
  * cdef class SingletonDelegate(Delegate):             # <<<<<<<<<<<<<<
@@ -1297,7 +1299,7 @@ struct __pyx_obj_19dependency_injector_9providers_SingletonDelegate {
 };
 
 
-/* "providers.pxd":186
+/* "providers.pxd":188
  * # Miscellaneous providers
  * 
  * cdef class List(Provider):             # <<<<<<<<<<<<<<
@@ -1311,7 +1313,7 @@ struct __pyx_obj_19dependency_injector_9providers_List {
 };
 
 
-/* "providers.pxd":193
+/* "providers.pxd":195
  * 
  * 
  * cdef class Dict(Provider):             # <<<<<<<<<<<<<<
@@ -1325,7 +1327,7 @@ struct __pyx_obj_19dependency_injector_9providers_Dict {
 };
 
 
-/* "providers.pxd":200
+/* "providers.pxd":202
  * 
  * 
  * cdef class Resource(Provider):             # <<<<<<<<<<<<<<
@@ -1345,7 +1347,7 @@ struct __pyx_obj_19dependency_injector_9providers_Resource {
 };
 
 
-/* "providers.pxd":215
+/* "providers.pxd":217
  * 
  * 
  * cdef class Container(Provider):             # <<<<<<<<<<<<<<
@@ -1360,7 +1362,7 @@ struct __pyx_obj_19dependency_injector_9providers_Container {
 };
 
 
-/* "providers.pxd":223
+/* "providers.pxd":225
  * 
  * 
  * cdef class Selector(Provider):             # <<<<<<<<<<<<<<
@@ -1374,7 +1376,7 @@ struct __pyx_obj_19dependency_injector_9providers_Selector {
 };
 
 
-/* "providers.pxd":231
+/* "providers.pxd":233
  * # Provided instance
  * 
  * cdef class ProvidedInstance(Provider):             # <<<<<<<<<<<<<<
@@ -1387,7 +1389,7 @@ struct __pyx_obj_19dependency_injector_9providers_ProvidedInstance {
 };
 
 
-/* "providers.pxd":237
+/* "providers.pxd":239
  * 
  * 
  * cdef class AttributeGetter(Provider):             # <<<<<<<<<<<<<<
@@ -1401,7 +1403,7 @@ struct __pyx_obj_19dependency_injector_9providers_AttributeGetter {
 };
 
 
-/* "providers.pxd":244
+/* "providers.pxd":246
  * 
  * 
  * cdef class ItemGetter(Provider):             # <<<<<<<<<<<<<<
@@ -1415,7 +1417,7 @@ struct __pyx_obj_19dependency_injector_9providers_ItemGetter {
 };
 
 
-/* "providers.pxd":251
+/* "providers.pxd":253
  * 
  * 
  * cdef class MethodCaller(Provider):             # <<<<<<<<<<<<<<
@@ -1432,7 +1434,7 @@ struct __pyx_obj_19dependency_injector_9providers_MethodCaller {
 };
 
 
-/* "providers.pxd":262
+/* "providers.pxd":264
  * 
  * # Injections
  * cdef class Injection(object):             # <<<<<<<<<<<<<<
@@ -1448,7 +1450,7 @@ struct __pyx_obj_19dependency_injector_9providers_Injection {
 };
 
 
-/* "providers.pxd":269
+/* "providers.pxd":271
  * 
  * 
  * cdef class PositionalInjection(Injection):             # <<<<<<<<<<<<<<
@@ -1460,7 +1462,7 @@ struct __pyx_obj_19dependency_injector_9providers_PositionalInjection {
 };
 
 
-/* "providers.pxd":273
+/* "providers.pxd":275
  * 
  * 
  * cdef class NamedInjection(Injection):             # <<<<<<<<<<<<<<
@@ -1796,7 +1798,7 @@ struct __pyx_vtabstruct_19dependency_injector_9providers_ConfigurationOption {
 static struct __pyx_vtabstruct_19dependency_injector_9providers_ConfigurationOption *__pyx_vtabptr_19dependency_injector_9providers_ConfigurationOption;
 
 
-/* "providers.pxd":104
+/* "providers.pxd":105
  * 
  * 
  * cdef class TypedConfigurationOption(Callable):             # <<<<<<<<<<<<<<
@@ -1810,12 +1812,12 @@ struct __pyx_vtabstruct_19dependency_injector_9providers_TypedConfigurationOptio
 static struct __pyx_vtabstruct_19dependency_injector_9providers_TypedConfigurationOption *__pyx_vtabptr_19dependency_injector_9providers_TypedConfigurationOption;
 
 
-/* "providers.pxd":108
+/* "providers.pxd":109
  * 
  * 
  * cdef class Configuration(Object):             # <<<<<<<<<<<<<<
  *     cdef str __name
- *     cdef dict __children
+ *     cdef bint __strict
  */
 
 struct __pyx_vtabstruct_19dependency_injector_9providers_Configuration {
@@ -1824,7 +1826,7 @@ struct __pyx_vtabstruct_19dependency_injector_9providers_Configuration {
 static struct __pyx_vtabstruct_19dependency_injector_9providers_Configuration *__pyx_vtabptr_19dependency_injector_9providers_Configuration;
 
 
-/* "providers.pxd":115
+/* "providers.pxd":117
  * 
  * # Factory providers
  * cdef class Factory(Provider):             # <<<<<<<<<<<<<<
@@ -1838,7 +1840,7 @@ struct __pyx_vtabstruct_19dependency_injector_9providers_Factory {
 static struct __pyx_vtabstruct_19dependency_injector_9providers_Factory *__pyx_vtabptr_19dependency_injector_9providers_Factory;
 
 
-/* "providers.pxd":124
+/* "providers.pxd":126
  * 
  * 
  * cdef class DelegatedFactory(Factory):             # <<<<<<<<<<<<<<
@@ -1852,7 +1854,7 @@ struct __pyx_vtabstruct_19dependency_injector_9providers_DelegatedFactory {
 static struct __pyx_vtabstruct_19dependency_injector_9providers_DelegatedFactory *__pyx_vtabptr_19dependency_injector_9providers_DelegatedFactory;
 
 
-/* "providers.pxd":128
+/* "providers.pxd":130
  * 
  * 
  * cdef class AbstractFactory(Factory):             # <<<<<<<<<<<<<<
@@ -1866,7 +1868,7 @@ struct __pyx_vtabstruct_19dependency_injector_9providers_AbstractFactory {
 static struct __pyx_vtabstruct_19dependency_injector_9providers_AbstractFactory *__pyx_vtabptr_19dependency_injector_9providers_AbstractFactory;
 
 
-/* "providers.pxd":132
+/* "providers.pxd":134
  * 
  * 
  * cdef class FactoryDelegate(Delegate):             # <<<<<<<<<<<<<<
@@ -1880,7 +1882,7 @@ struct __pyx_vtabstruct_19dependency_injector_9providers_FactoryDelegate {
 static struct __pyx_vtabstruct_19dependency_injector_9providers_FactoryDelegate *__pyx_vtabptr_19dependency_injector_9providers_FactoryDelegate;
 
 
-/* "providers.pxd":136
+/* "providers.pxd":138
  * 
  * 
  * cdef class FactoryAggregate(Provider):             # <<<<<<<<<<<<<<
@@ -1895,7 +1897,7 @@ struct __pyx_vtabstruct_19dependency_injector_9providers_FactoryAggregate {
 static struct __pyx_vtabstruct_19dependency_injector_9providers_FactoryAggregate *__pyx_vtabptr_19dependency_injector_9providers_FactoryAggregate;
 
 
-/* "providers.pxd":143
+/* "providers.pxd":145
  * 
  * # Singleton providers
  * cdef class BaseSingleton(Provider):             # <<<<<<<<<<<<<<
@@ -1909,7 +1911,7 @@ struct __pyx_vtabstruct_19dependency_injector_9providers_BaseSingleton {
 static struct __pyx_vtabstruct_19dependency_injector_9providers_BaseSingleton *__pyx_vtabptr_19dependency_injector_9providers_BaseSingleton;
 
 
-/* "providers.pxd":148
+/* "providers.pxd":150
  * 
  * 
  * cdef class Singleton(BaseSingleton):             # <<<<<<<<<<<<<<
@@ -1923,7 +1925,7 @@ struct __pyx_vtabstruct_19dependency_injector_9providers_Singleton {
 static struct __pyx_vtabstruct_19dependency_injector_9providers_Singleton *__pyx_vtabptr_19dependency_injector_9providers_Singleton;
 
 
-/* "providers.pxd":153
+/* "providers.pxd":155
  * 
  * 
  * cdef class DelegatedSingleton(Singleton):             # <<<<<<<<<<<<<<
@@ -1937,7 +1939,7 @@ struct __pyx_vtabstruct_19dependency_injector_9providers_DelegatedSingleton {
 static struct __pyx_vtabstruct_19dependency_injector_9providers_DelegatedSingleton *__pyx_vtabptr_19dependency_injector_9providers_DelegatedSingleton;
 
 
-/* "providers.pxd":157
+/* "providers.pxd":159
  * 
  * 
  * cdef class ThreadSafeSingleton(BaseSingleton):             # <<<<<<<<<<<<<<
@@ -1951,7 +1953,7 @@ struct __pyx_vtabstruct_19dependency_injector_9providers_ThreadSafeSingleton {
 static struct __pyx_vtabstruct_19dependency_injector_9providers_ThreadSafeSingleton *__pyx_vtabptr_19dependency_injector_9providers_ThreadSafeSingleton;
 
 
-/* "providers.pxd":163
+/* "providers.pxd":165
  * 
  * 
  * cdef class DelegatedThreadSafeSingleton(ThreadSafeSingleton):             # <<<<<<<<<<<<<<
@@ -1965,7 +1967,7 @@ struct __pyx_vtabstruct_19dependency_injector_9providers_DelegatedThreadSafeSing
 static struct __pyx_vtabstruct_19dependency_injector_9providers_DelegatedThreadSafeSingleton *__pyx_vtabptr_19dependency_injector_9providers_DelegatedThreadSafeSingleton;
 
 
-/* "providers.pxd":167
+/* "providers.pxd":169
  * 
  * 
  * cdef class ThreadLocalSingleton(BaseSingleton):             # <<<<<<<<<<<<<<
@@ -1979,7 +1981,7 @@ struct __pyx_vtabstruct_19dependency_injector_9providers_ThreadLocalSingleton {
 static struct __pyx_vtabstruct_19dependency_injector_9providers_ThreadLocalSingleton *__pyx_vtabptr_19dependency_injector_9providers_ThreadLocalSingleton;
 
 
-/* "providers.pxd":172
+/* "providers.pxd":174
  * 
  * 
  * cdef class DelegatedThreadLocalSingleton(ThreadLocalSingleton):             # <<<<<<<<<<<<<<
@@ -1993,7 +1995,7 @@ struct __pyx_vtabstruct_19dependency_injector_9providers_DelegatedThreadLocalSin
 static struct __pyx_vtabstruct_19dependency_injector_9providers_DelegatedThreadLocalSingleton *__pyx_vtabptr_19dependency_injector_9providers_DelegatedThreadLocalSingleton;
 
 
-/* "providers.pxd":176
+/* "providers.pxd":178
  * 
  * 
  * cdef class AbstractSingleton(BaseSingleton):             # <<<<<<<<<<<<<<
@@ -2007,7 +2009,7 @@ struct __pyx_vtabstruct_19dependency_injector_9providers_AbstractSingleton {
 static struct __pyx_vtabstruct_19dependency_injector_9providers_AbstractSingleton *__pyx_vtabptr_19dependency_injector_9providers_AbstractSingleton;
 
 
-/* "providers.pxd":180
+/* "providers.pxd":182
  * 
  * 
  * cdef class SingletonDelegate(Delegate):             # <<<<<<<<<<<<<<
@@ -2021,7 +2023,7 @@ struct __pyx_vtabstruct_19dependency_injector_9providers_SingletonDelegate {
 static struct __pyx_vtabstruct_19dependency_injector_9providers_SingletonDelegate *__pyx_vtabptr_19dependency_injector_9providers_SingletonDelegate;
 
 
-/* "providers.pxd":186
+/* "providers.pxd":188
  * # Miscellaneous providers
  * 
  * cdef class List(Provider):             # <<<<<<<<<<<<<<
@@ -2035,7 +2037,7 @@ struct __pyx_vtabstruct_19dependency_injector_9providers_List {
 static struct __pyx_vtabstruct_19dependency_injector_9providers_List *__pyx_vtabptr_19dependency_injector_9providers_List;
 
 
-/* "providers.pxd":193
+/* "providers.pxd":195
  * 
  * 
  * cdef class Dict(Provider):             # <<<<<<<<<<<<<<
@@ -2049,7 +2051,7 @@ struct __pyx_vtabstruct_19dependency_injector_9providers_Dict {
 static struct __pyx_vtabstruct_19dependency_injector_9providers_Dict *__pyx_vtabptr_19dependency_injector_9providers_Dict;
 
 
-/* "providers.pxd":200
+/* "providers.pxd":202
  * 
  * 
  * cdef class Resource(Provider):             # <<<<<<<<<<<<<<
@@ -2063,7 +2065,7 @@ struct __pyx_vtabstruct_19dependency_injector_9providers_Resource {
 static struct __pyx_vtabstruct_19dependency_injector_9providers_Resource *__pyx_vtabptr_19dependency_injector_9providers_Resource;
 
 
-/* "providers.pxd":215
+/* "providers.pxd":217
  * 
  * 
  * cdef class Container(Provider):             # <<<<<<<<<<<<<<
@@ -2077,7 +2079,7 @@ struct __pyx_vtabstruct_19dependency_injector_9providers_Container {
 static struct __pyx_vtabstruct_19dependency_injector_9providers_Container *__pyx_vtabptr_19dependency_injector_9providers_Container;
 
 
-/* "providers.pxd":223
+/* "providers.pxd":225
  * 
  * 
  * cdef class Selector(Provider):             # <<<<<<<<<<<<<<
@@ -2091,7 +2093,7 @@ struct __pyx_vtabstruct_19dependency_injector_9providers_Selector {
 static struct __pyx_vtabstruct_19dependency_injector_9providers_Selector *__pyx_vtabptr_19dependency_injector_9providers_Selector;
 
 
-/* "providers.pxd":231
+/* "providers.pxd":233
  * # Provided instance
  * 
  * cdef class ProvidedInstance(Provider):             # <<<<<<<<<<<<<<
@@ -2105,7 +2107,7 @@ struct __pyx_vtabstruct_19dependency_injector_9providers_ProvidedInstance {
 static struct __pyx_vtabstruct_19dependency_injector_9providers_ProvidedInstance *__pyx_vtabptr_19dependency_injector_9providers_ProvidedInstance;
 
 
-/* "providers.pxd":237
+/* "providers.pxd":239
  * 
  * 
  * cdef class AttributeGetter(Provider):             # <<<<<<<<<<<<<<
@@ -2119,7 +2121,7 @@ struct __pyx_vtabstruct_19dependency_injector_9providers_AttributeGetter {
 static struct __pyx_vtabstruct_19dependency_injector_9providers_AttributeGetter *__pyx_vtabptr_19dependency_injector_9providers_AttributeGetter;
 
 
-/* "providers.pxd":244
+/* "providers.pxd":246
  * 
  * 
  * cdef class ItemGetter(Provider):             # <<<<<<<<<<<<<<
@@ -2133,7 +2135,7 @@ struct __pyx_vtabstruct_19dependency_injector_9providers_ItemGetter {
 static struct __pyx_vtabstruct_19dependency_injector_9providers_ItemGetter *__pyx_vtabptr_19dependency_injector_9providers_ItemGetter;
 
 
-/* "providers.pxd":251
+/* "providers.pxd":253
  * 
  * 
  * cdef class MethodCaller(Provider):             # <<<<<<<<<<<<<<
@@ -12395,7 +12397,7 @@ static PyObject *__pyx_pf_19dependency_injector_10containers_12_isawaitable(CYTH
   return __pyx_r;
 }
 
-/* "providers.pxd":303
+/* "providers.pxd":305
  * 
  * # Inline helper functions
  * cdef inline object __get_name(NamedInjection self):             # <<<<<<<<<<<<<<
@@ -12408,7 +12410,7 @@ static CYTHON_INLINE PyObject *__pyx_f_19dependency_injector_9providers___get_na
   __Pyx_RefNannyDeclarations
   __Pyx_RefNannySetupContext("__get_name", 0);
 
-  /* "providers.pxd":304
+  /* "providers.pxd":306
  * # Inline helper functions
  * cdef inline object __get_name(NamedInjection self):
  *     return self.__name             # <<<<<<<<<<<<<<
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@@ -12866,30 +12868,30 @@ static CYTHON_INLINE PyObject *__pyx_f_19dependency_injector_9providers___separa
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-      /* "providers.pxd":332
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-    /* "providers.pxd":333
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-  /* "providers.pxd":335
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-  __pyx_t_2 = PyTuple_New(2); if (unlikely(!__pyx_t_2)) __PYX_ERR(1, 335, __pyx_L1_error)
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@@ -12941,7 +12943,7 @@ static CYTHON_INLINE PyObject *__pyx_f_19dependency_injector_9providers___separa
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-  /* "providers.pxd":319
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-  __pyx_t_1 = PyList_New(0); if (unlikely(!__pyx_t_1)) __PYX_ERR(1, 346, __pyx_L1_error)
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-  /* "providers.pxd":347
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-  __pyx_t_1 = PyList_New(0); if (unlikely(!__pyx_t_1)) __PYX_ERR(1, 347, __pyx_L1_error)
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-  /* "providers.pxd":350
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-    /* "providers.pxd":351
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-    /* "providers.pxd":350
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-  /* "providers.pxd":353
+  /* "providers.pxd":355
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-    /* "providers.pxd":354
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-    /* "providers.pxd":356
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-    /* "providers.pxd":358
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-      /* "providers.pxd":359
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-      /* "providers.pxd":358
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@@ -13143,16 +13145,16 @@ static CYTHON_INLINE PyObject *__pyx_f_19dependency_injector_9providers___provid
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-  /* "providers.pxd":361
+  /* "providers.pxd":363
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-  /* "providers.pxd":363
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-    /* "providers.pxd":364
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+    __pyx_t_7 = __pyx_f_19dependency_injector_9providers___awaitable_args_kwargs_future(__pyx_v_positional_args, __pyx_v_awaitables); if (unlikely(!__pyx_t_7)) __PYX_ERR(1, 366, __pyx_L1_error)
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-  /* "providers.pxd":380
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  *     cdef list awaitables = []             # <<<<<<<<<<<<<<
  *     cdef NamedInjection kw_injection
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-  __pyx_t_1 = PyList_New(0); if (unlikely(!__pyx_t_1)) __PYX_ERR(1, 380, __pyx_L1_error)
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-  /* "providers.pxd":383
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-    /* "providers.pxd":384
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-      /* "providers.pxd":385
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+      __pyx_t_1 = __pyx_f_19dependency_injector_9providers___get_name(__pyx_v_kw_injection); if (unlikely(!__pyx_t_1)) __PYX_ERR(1, 388, __pyx_L1_error)
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-      /* "providers.pxd":387
+      /* "providers.pxd":389
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+      __pyx_t_1 = __pyx_f_19dependency_injector_9providers___get_value(((struct __pyx_obj_19dependency_injector_9providers_Injection *)__pyx_v_kw_injection)); if (unlikely(!__pyx_t_1)) __PYX_ERR(1, 389, __pyx_L1_error)
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-      /* "providers.pxd":388
+      /* "providers.pxd":390
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  *             value = __get_value(kw_injection)
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@@ -13354,11 +13356,11 @@ static CYTHON_INLINE PyObject *__pyx_f_19dependency_injector_9providers___provid
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         PyErr_SetString(PyExc_TypeError, "'NoneType' object is not subscriptable");
-        __PYX_ERR(1, 388, __pyx_L1_error)
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-      if (unlikely(PyDict_SetItem(__pyx_v_kwargs, __pyx_v_name, __pyx_v_value) < 0)) __PYX_ERR(1, 388, __pyx_L1_error)
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-      /* "providers.pxd":389
+      /* "providers.pxd":391
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@@ -13368,14 +13370,14 @@ static CYTHON_INLINE PyObject *__pyx_f_19dependency_injector_9providers___provid
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       if (__pyx_t_3) {
 
-        /* "providers.pxd":390
+        /* "providers.pxd":392
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-        __pyx_t_1 = PyTuple_New(2); if (unlikely(!__pyx_t_1)) __PYX_ERR(1, 390, __pyx_L1_error)
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@@ -13383,10 +13385,10 @@ static CYTHON_INLINE PyObject *__pyx_f_19dependency_injector_9providers___provid
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+        __pyx_t_7 = __Pyx_PyList_Append(__pyx_v_awaitables, __pyx_t_1); if (unlikely(__pyx_t_7 == ((int)-1))) __PYX_ERR(1, 392, __pyx_L1_error)
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-        /* "providers.pxd":389
+        /* "providers.pxd":391
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  *             if __isawaitable(value):             # <<<<<<<<<<<<<<
@@ -13396,7 +13398,7 @@ static CYTHON_INLINE PyObject *__pyx_f_19dependency_injector_9providers___provid
       }
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-    /* "providers.pxd":383
+    /* "providers.pxd":385
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@@ -13406,7 +13408,7 @@ static CYTHON_INLINE PyObject *__pyx_f_19dependency_injector_9providers___provid
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-  /* "providers.pxd":392
+  /* "providers.pxd":394
  *                 awaitables.append((name, value))
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@@ -13414,7 +13416,7 @@ static CYTHON_INLINE PyObject *__pyx_f_19dependency_injector_9providers___provid
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+    __pyx_t_1 = __pyx_f_19dependency_injector_9providers___separate_prefixed_kwargs(__pyx_v_kwargs); if (unlikely(!__pyx_t_1)) __PYX_ERR(1, 394, __pyx_L1_error)
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@@ -13422,7 +13424,7 @@ static CYTHON_INLINE PyObject *__pyx_f_19dependency_injector_9providers___provid
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-        __PYX_ERR(1, 392, __pyx_L1_error)
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-      __pyx_t_9 = PySequence_ITEM(sequence, 1); if (unlikely(!__pyx_t_9)) __PYX_ERR(1, 392, __pyx_L1_error)
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-    /* "providers.pxd":395
+    /* "providers.pxd":397
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@@ -13458,7 +13460,7 @@ static CYTHON_INLINE PyObject *__pyx_f_19dependency_injector_9providers___provid
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-      /* "providers.pxd":396
+      /* "providers.pxd":398
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@@ -13467,26 +13469,26 @@ static CYTHON_INLINE PyObject *__pyx_f_19dependency_injector_9providers___provid
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         PyErr_SetString(PyExc_TypeError, "'NoneType' object is not subscriptable");
-        __PYX_ERR(1, 396, __pyx_L1_error)
+        __PYX_ERR(1, 398, __pyx_L1_error)
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-      /* "providers.pxd":397
+      /* "providers.pxd":399
  *         for index in range(inj_kwargs_len):
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  *             if name in kwargs:
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-      __pyx_t_1 = __pyx_f_19dependency_injector_9providers___get_name(__pyx_v_kw_injection); if (unlikely(!__pyx_t_1)) __PYX_ERR(1, 397, __pyx_L1_error)
+      __pyx_t_1 = __pyx_f_19dependency_injector_9providers___get_name(__pyx_v_kw_injection); if (unlikely(!__pyx_t_1)) __PYX_ERR(1, 399, __pyx_L1_error)
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-      /* "providers.pxd":399
+      /* "providers.pxd":401
  *             name = __get_name(kw_injection)
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-        __PYX_ERR(1, 399, __pyx_L1_error)
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-        /* "providers.pxd":400
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  *             if name in kwargs:
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@@ -13510,7 +13512,7 @@ static CYTHON_INLINE PyObject *__pyx_f_19dependency_injector_9providers___provid
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         goto __pyx_L7_continue;
 
-        /* "providers.pxd":399
+        /* "providers.pxd":401
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@@ -13519,7 +13521,7 @@ static CYTHON_INLINE PyObject *__pyx_f_19dependency_injector_9providers___provid
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-      /* "providers.pxd":402
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  * 
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@@ -13528,13 +13530,13 @@ static CYTHON_INLINE PyObject *__pyx_f_19dependency_injector_9providers___provid
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         PyErr_SetString(PyExc_TypeError, "'NoneType' object is not iterable");
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-        /* "providers.pxd":403
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+        if (!(likely(PyDict_CheckExact(__pyx_t_1))||((__pyx_t_1) == Py_None)||(PyErr_Format(PyExc_TypeError, "Expected %.16s, got %.200s", "dict", Py_TYPE(__pyx_t_1)->tp_name), 0))) __PYX_ERR(1, 405, __pyx_L1_error)
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-        /* "providers.pxd":402
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@@ -13564,7 +13566,7 @@ static CYTHON_INLINE PyObject *__pyx_f_19dependency_injector_9providers___provid
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-      /* "providers.pxd":405
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+        __pyx_t_9 = __pyx_f_19dependency_injector_9providers___get_value(((struct __pyx_obj_19dependency_injector_9providers_Injection *)__pyx_v_kw_injection)); if (unlikely(!__pyx_t_9)) __PYX_ERR(1, 407, __pyx_L1_error)
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-      /* "providers.pxd":407
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         PyErr_SetString(PyExc_TypeError, "'NoneType' object is not subscriptable");
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-      /* "providers.pxd":408
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@@ -13602,14 +13604,14 @@ static CYTHON_INLINE PyObject *__pyx_f_19dependency_injector_9providers___provid
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-        /* "providers.pxd":409
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-        __pyx_t_9 = PyTuple_New(2); if (unlikely(!__pyx_t_9)) __PYX_ERR(1, 409, __pyx_L1_error)
+        __pyx_t_9 = PyTuple_New(2); if (unlikely(!__pyx_t_9)) __PYX_ERR(1, 411, __pyx_L1_error)
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@@ -13617,10 +13619,10 @@ static CYTHON_INLINE PyObject *__pyx_f_19dependency_injector_9providers___provid
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+        __pyx_t_7 = __Pyx_PyList_Append(__pyx_v_awaitables, __pyx_t_9); if (unlikely(__pyx_t_7 == ((int)-1))) __PYX_ERR(1, 411, __pyx_L1_error)
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-        /* "providers.pxd":408
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-    /* "providers.pxd":412
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@@ -16389,7 +16391,7 @@ static CYTHON_INLINE PyObject *__pyx_f_19dependency_injector_9providers___factor
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@@ -16398,7 +16400,7 @@ static CYTHON_INLINE PyObject *__pyx_f_19dependency_injector_9providers___factor
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+      __pyx_t_1 = __pyx_f_19dependency_injector_9providers___async_inject_attributes(__pyx_v_instance, __pyx_v_attributes); if (unlikely(!__pyx_t_1)) __PYX_ERR(1, 571, __pyx_L1_error)
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@@ -16421,17 +16423,17 @@ static CYTHON_INLINE PyObject *__pyx_f_19dependency_injector_9providers___factor
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-    /* "providers.pxd":571
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-  /* "providers.pxd":573
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@@ -16507,16 +16509,16 @@ static CYTHON_INLINE int __pyx_f_19dependency_injector_9providers___isawaitable(
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-    /* "providers.pxd":583
+    /* "providers.pxd":585
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+    __pyx_t_4 = __Pyx_PyObject_GetAttrStr(__pyx_t_3, __pyx_n_s_isawaitable); if (unlikely(!__pyx_t_4)) __PYX_ERR(1, 585, __pyx_L1_error)
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@@ -16531,15 +16533,15 @@ static CYTHON_INLINE int __pyx_f_19dependency_injector_9providers___isawaitable(
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-    if (unlikely(!__pyx_t_2)) __PYX_ERR(1, 583, __pyx_L1_error)
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@@ -16548,21 +16550,21 @@ static CYTHON_INLINE int __pyx_f_19dependency_injector_9providers___isawaitable(
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-  /* "providers.pxd":585
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-  __Pyx_GetModuleGlobalName(__pyx_t_2, __pyx_n_s_inspect); if (unlikely(!__pyx_t_2)) __PYX_ERR(1, 585, __pyx_L1_error)
+  __Pyx_GetModuleGlobalName(__pyx_t_2, __pyx_n_s_inspect); if (unlikely(!__pyx_t_2)) __PYX_ERR(1, 587, __pyx_L1_error)
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+  __pyx_t_1 = __Pyx_HasAttr(__pyx_t_2, __pyx_n_s_isawaitable); if (unlikely(__pyx_t_1 == ((int)-1))) __PYX_ERR(1, 587, __pyx_L1_error)
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-    /* "providers.pxd":586
+    /* "providers.pxd":588
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     __pyx_v_19dependency_injector_9providers___has_isawaitable = 1;
 
-    /* "providers.pxd":587
+    /* "providers.pxd":589
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-    __Pyx_GetModuleGlobalName(__pyx_t_4, __pyx_n_s_inspect); if (unlikely(!__pyx_t_4)) __PYX_ERR(1, 587, __pyx_L1_error)
+    __Pyx_GetModuleGlobalName(__pyx_t_4, __pyx_n_s_inspect); if (unlikely(!__pyx_t_4)) __PYX_ERR(1, 589, __pyx_L1_error)
     __Pyx_GOTREF(__pyx_t_4);
-    __pyx_t_3 = __Pyx_PyObject_GetAttrStr(__pyx_t_4, __pyx_n_s_isawaitable); if (unlikely(!__pyx_t_3)) __PYX_ERR(1, 587, __pyx_L1_error)
+    __pyx_t_3 = __Pyx_PyObject_GetAttrStr(__pyx_t_4, __pyx_n_s_isawaitable); if (unlikely(!__pyx_t_3)) __PYX_ERR(1, 589, __pyx_L1_error)
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@@ -16595,15 +16597,15 @@ static CYTHON_INLINE int __pyx_f_19dependency_injector_9providers___isawaitable(
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     __pyx_t_2 = (__pyx_t_4) ? __Pyx_PyObject_Call2Args(__pyx_t_3, __pyx_t_4, __pyx_v_instance) : __Pyx_PyObject_CallOneArg(__pyx_t_3, __pyx_v_instance);
     __Pyx_XDECREF(__pyx_t_4); __pyx_t_4 = 0;
-    if (unlikely(!__pyx_t_2)) __PYX_ERR(1, 587, __pyx_L1_error)
+    if (unlikely(!__pyx_t_2)) __PYX_ERR(1, 589, __pyx_L1_error)
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     __Pyx_DECREF(__pyx_t_3); __pyx_t_3 = 0;
-    __pyx_t_5 = __Pyx_PyObject_IsTrue(__pyx_t_2); if (unlikely((__pyx_t_5 == (int)-1) && PyErr_Occurred())) __PYX_ERR(1, 587, __pyx_L1_error)
+    __pyx_t_5 = __Pyx_PyObject_IsTrue(__pyx_t_2); if (unlikely((__pyx_t_5 == (int)-1) && PyErr_Occurred())) __PYX_ERR(1, 589, __pyx_L1_error)
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-    /* "providers.pxd":585
+    /* "providers.pxd":587
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  *     if hasattr(inspect, 'isawaitable'):             # <<<<<<<<<<<<<<
@@ -16612,7 +16614,7 @@ static CYTHON_INLINE int __pyx_f_19dependency_injector_9providers___isawaitable(
  */
   }
 
-  /* "providers.pxd":589
+  /* "providers.pxd":591
  *         return inspect.isawaitable(instance)
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  *     return False             # <<<<<<<<<<<<<<
@@ -16620,7 +16622,7 @@ static CYTHON_INLINE int __pyx_f_19dependency_injector_9providers___isawaitable(
   __pyx_r = 0;
   goto __pyx_L0;
 
-  /* "providers.pxd":579
+  /* "providers.pxd":581
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@@ -17803,8 +17805,8 @@ static CYTHON_SMALL_CODE int __Pyx_InitCachedBuiltins(void) {
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   __pyx_builtin_AttributeError = __Pyx_GetBuiltinName(__pyx_n_s_AttributeError); if (!__pyx_builtin_AttributeError) __PYX_ERR(0, 178, __pyx_L1_error)
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-  __pyx_builtin_zip = __Pyx_GetBuiltinName(__pyx_n_s_zip); if (!__pyx_builtin_zip) __PYX_ERR(1, 432, __pyx_L1_error)
+  __pyx_builtin_range = __Pyx_GetBuiltinName(__pyx_n_s_range); if (!__pyx_builtin_range) __PYX_ERR(1, 355, __pyx_L1_error)
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diff --git a/src/dependency_injector/providers.c b/src/dependency_injector/providers.c
index cf8499b6..f31d1acc 100644
--- a/src/dependency_injector/providers.c
+++ b/src/dependency_injector/providers.c
@@ -870,7 +870,7 @@ struct __pyx_obj_19dependency_injector_9providers___pyx_scope_struct_3_genexpr;
 struct __pyx_obj___pyx_scope_struct____Pyx_CFunc_void____object___to_py;
 struct __pyx_opt_args_19dependency_injector_9providers_deepcopy;
 
-/* "dependency_injector/providers.pxd":299
+/* "dependency_injector/providers.pxd":301
  * 
  * 
  * cpdef object deepcopy(object instance, dict memo=*)             # <<<<<<<<<<<<<<
@@ -1089,11 +1089,12 @@ struct __pyx_obj_19dependency_injector_9providers_ConfigurationOption {
   PyObject *__pyx___name;
   PyObject *__pyx___root_ref;
   PyObject *__pyx___children;
+  int __pyx___required;
   PyObject *__pyx___cache;
 };
 
 
-/* "dependency_injector/providers.pxd":104
+/* "dependency_injector/providers.pxd":105
  * 
  * 
  * cdef class TypedConfigurationOption(Callable):             # <<<<<<<<<<<<<<
@@ -1105,22 +1106,23 @@ struct __pyx_obj_19dependency_injector_9providers_TypedConfigurationOption {
 };
 
 
-/* "dependency_injector/providers.pxd":108
+/* "dependency_injector/providers.pxd":109
  * 
  * 
  * cdef class Configuration(Object):             # <<<<<<<<<<<<<<
  *     cdef str __name
- *     cdef dict __children
+ *     cdef bint __strict
  */
 struct __pyx_obj_19dependency_injector_9providers_Configuration {
   struct __pyx_obj_19dependency_injector_9providers_Object __pyx_base;
   PyObject *__pyx___name;
+  int __pyx___strict;
   PyObject *__pyx___children;
   PyObject *__weakref__;
 };
 
 
-/* "dependency_injector/providers.pxd":115
+/* "dependency_injector/providers.pxd":117
  * 
  * # Factory providers
  * cdef class Factory(Provider):             # <<<<<<<<<<<<<<
@@ -1135,7 +1137,7 @@ struct __pyx_obj_19dependency_injector_9providers_Factory {
 };
 
 
-/* "dependency_injector/providers.pxd":124
+/* "dependency_injector/providers.pxd":126
  * 
  * 
  * cdef class DelegatedFactory(Factory):             # <<<<<<<<<<<<<<
@@ -1147,7 +1149,7 @@ struct __pyx_obj_19dependency_injector_9providers_DelegatedFactory {
 };
 
 
-/* "dependency_injector/providers.pxd":128
+/* "dependency_injector/providers.pxd":130
  * 
  * 
  * cdef class AbstractFactory(Factory):             # <<<<<<<<<<<<<<
@@ -1159,7 +1161,7 @@ struct __pyx_obj_19dependency_injector_9providers_AbstractFactory {
 };
 
 
-/* "dependency_injector/providers.pxd":132
+/* "dependency_injector/providers.pxd":134
  * 
  * 
  * cdef class FactoryDelegate(Delegate):             # <<<<<<<<<<<<<<
@@ -1171,7 +1173,7 @@ struct __pyx_obj_19dependency_injector_9providers_FactoryDelegate {
 };
 
 
-/* "dependency_injector/providers.pxd":136
+/* "dependency_injector/providers.pxd":138
  * 
  * 
  * cdef class FactoryAggregate(Provider):             # <<<<<<<<<<<<<<
@@ -1184,7 +1186,7 @@ struct __pyx_obj_19dependency_injector_9providers_FactoryAggregate {
 };
 
 
-/* "dependency_injector/providers.pxd":143
+/* "dependency_injector/providers.pxd":145
  * 
  * # Singleton providers
  * cdef class BaseSingleton(Provider):             # <<<<<<<<<<<<<<
@@ -1198,7 +1200,7 @@ struct __pyx_obj_19dependency_injector_9providers_BaseSingleton {
 };
 
 
-/* "dependency_injector/providers.pxd":148
+/* "dependency_injector/providers.pxd":150
  * 
  * 
  * cdef class Singleton(BaseSingleton):             # <<<<<<<<<<<<<<
@@ -1210,7 +1212,7 @@ struct __pyx_obj_19dependency_injector_9providers_Singleton {
 };
 
 
-/* "dependency_injector/providers.pxd":153
+/* "dependency_injector/providers.pxd":155
  * 
  * 
  * cdef class DelegatedSingleton(Singleton):             # <<<<<<<<<<<<<<
@@ -1222,7 +1224,7 @@ struct __pyx_obj_19dependency_injector_9providers_DelegatedSingleton {
 };
 
 
-/* "dependency_injector/providers.pxd":157
+/* "dependency_injector/providers.pxd":159
  * 
  * 
  * cdef class ThreadSafeSingleton(BaseSingleton):             # <<<<<<<<<<<<<<
@@ -1235,7 +1237,7 @@ struct __pyx_obj_19dependency_injector_9providers_ThreadSafeSingleton {
 };
 
 
-/* "dependency_injector/providers.pxd":163
+/* "dependency_injector/providers.pxd":165
  * 
  * 
  * cdef class DelegatedThreadSafeSingleton(ThreadSafeSingleton):             # <<<<<<<<<<<<<<
@@ -1247,7 +1249,7 @@ struct __pyx_obj_19dependency_injector_9providers_DelegatedThreadSafeSingleton {
 };
 
 
-/* "dependency_injector/providers.pxd":167
+/* "dependency_injector/providers.pxd":169
  * 
  * 
  * cdef class ThreadLocalSingleton(BaseSingleton):             # <<<<<<<<<<<<<<
@@ -1259,7 +1261,7 @@ struct __pyx_obj_19dependency_injector_9providers_ThreadLocalSingleton {
 };
 
 
-/* "dependency_injector/providers.pxd":172
+/* "dependency_injector/providers.pxd":174
  * 
  * 
  * cdef class DelegatedThreadLocalSingleton(ThreadLocalSingleton):             # <<<<<<<<<<<<<<
@@ -1271,7 +1273,7 @@ struct __pyx_obj_19dependency_injector_9providers_DelegatedThreadLocalSingleton
 };
 
 
-/* "dependency_injector/providers.pxd":176
+/* "dependency_injector/providers.pxd":178
  * 
  * 
  * cdef class AbstractSingleton(BaseSingleton):             # <<<<<<<<<<<<<<
@@ -1283,7 +1285,7 @@ struct __pyx_obj_19dependency_injector_9providers_AbstractSingleton {
 };
 
 
-/* "dependency_injector/providers.pxd":180
+/* "dependency_injector/providers.pxd":182
  * 
  * 
  * cdef class SingletonDelegate(Delegate):             # <<<<<<<<<<<<<<
@@ -1295,7 +1297,7 @@ struct __pyx_obj_19dependency_injector_9providers_SingletonDelegate {
 };
 
 
-/* "dependency_injector/providers.pxd":186
+/* "dependency_injector/providers.pxd":188
  * # Miscellaneous providers
  * 
  * cdef class List(Provider):             # <<<<<<<<<<<<<<
@@ -1309,7 +1311,7 @@ struct __pyx_obj_19dependency_injector_9providers_List {
 };
 
 
-/* "dependency_injector/providers.pxd":193
+/* "dependency_injector/providers.pxd":195
  * 
  * 
  * cdef class Dict(Provider):             # <<<<<<<<<<<<<<
@@ -1323,7 +1325,7 @@ struct __pyx_obj_19dependency_injector_9providers_Dict {
 };
 
 
-/* "dependency_injector/providers.pxd":200
+/* "dependency_injector/providers.pxd":202
  * 
  * 
  * cdef class Resource(Provider):             # <<<<<<<<<<<<<<
@@ -1343,7 +1345,7 @@ struct __pyx_obj_19dependency_injector_9providers_Resource {
 };
 
 
-/* "dependency_injector/providers.pxd":215
+/* "dependency_injector/providers.pxd":217
  * 
  * 
  * cdef class Container(Provider):             # <<<<<<<<<<<<<<
@@ -1358,7 +1360,7 @@ struct __pyx_obj_19dependency_injector_9providers_Container {
 };
 
 
-/* "dependency_injector/providers.pxd":223
+/* "dependency_injector/providers.pxd":225
  * 
  * 
  * cdef class Selector(Provider):             # <<<<<<<<<<<<<<
@@ -1372,7 +1374,7 @@ struct __pyx_obj_19dependency_injector_9providers_Selector {
 };
 
 
-/* "dependency_injector/providers.pxd":231
+/* "dependency_injector/providers.pxd":233
  * # Provided instance
  * 
  * cdef class ProvidedInstance(Provider):             # <<<<<<<<<<<<<<
@@ -1385,7 +1387,7 @@ struct __pyx_obj_19dependency_injector_9providers_ProvidedInstance {
 };
 
 
-/* "dependency_injector/providers.pxd":237
+/* "dependency_injector/providers.pxd":239
  * 
  * 
  * cdef class AttributeGetter(Provider):             # <<<<<<<<<<<<<<
@@ -1399,7 +1401,7 @@ struct __pyx_obj_19dependency_injector_9providers_AttributeGetter {
 };
 
 
-/* "dependency_injector/providers.pxd":244
+/* "dependency_injector/providers.pxd":246
  * 
  * 
  * cdef class ItemGetter(Provider):             # <<<<<<<<<<<<<<
@@ -1413,7 +1415,7 @@ struct __pyx_obj_19dependency_injector_9providers_ItemGetter {
 };
 
 
-/* "dependency_injector/providers.pxd":251
+/* "dependency_injector/providers.pxd":253
  * 
  * 
  * cdef class MethodCaller(Provider):             # <<<<<<<<<<<<<<
@@ -1430,7 +1432,7 @@ struct __pyx_obj_19dependency_injector_9providers_MethodCaller {
 };
 
 
-/* "dependency_injector/providers.pxd":262
+/* "dependency_injector/providers.pxd":264
  * 
  * # Injections
  * cdef class Injection(object):             # <<<<<<<<<<<<<<
@@ -1446,7 +1448,7 @@ struct __pyx_obj_19dependency_injector_9providers_Injection {
 };
 
 
-/* "dependency_injector/providers.pxd":269
+/* "dependency_injector/providers.pxd":271
  * 
  * 
  * cdef class PositionalInjection(Injection):             # <<<<<<<<<<<<<<
@@ -1458,7 +1460,7 @@ struct __pyx_obj_19dependency_injector_9providers_PositionalInjection {
 };
 
 
-/* "dependency_injector/providers.pxd":273
+/* "dependency_injector/providers.pxd":275
  * 
  * 
  * cdef class NamedInjection(Injection):             # <<<<<<<<<<<<<<
@@ -1471,7 +1473,7 @@ struct __pyx_obj_19dependency_injector_9providers_NamedInjection {
 };
 
 
-/* "dependency_injector/providers.pyx":1236
+/* "dependency_injector/providers.pyx":1237
  *         return value
  * 
  *     def _get_self_name(self):             # <<<<<<<<<<<<<<
@@ -1484,7 +1486,7 @@ struct __pyx_obj_19dependency_injector_9providers___pyx_scope_struct___get_self_
 };
 
 
-/* "dependency_injector/providers.pyx":1238
+/* "dependency_injector/providers.pyx":1239
  *     def _get_self_name(self):
  *         return '.'.join(
  *             segment() if is_provider(segment) else segment for segment in self.__name             # <<<<<<<<<<<<<<
@@ -1500,7 +1502,7 @@ struct __pyx_obj_19dependency_injector_9providers___pyx_scope_struct_1_genexpr {
 };
 
 
-/* "dependency_injector/providers.pyx":3162
+/* "dependency_injector/providers.pyx":3177
  *         return self.__providers[name]
  * 
  *     def __str__(self):             # <<<<<<<<<<<<<<
@@ -1513,7 +1515,7 @@ struct __pyx_obj_19dependency_injector_9providers___pyx_scope_struct_2___str__ {
 };
 
 
-/* "dependency_injector/providers.pyx":3172
+/* "dependency_injector/providers.pyx":3187
  *             selector=self.__selector,
  *             providers=', '.join((
  *                 '{0}={1}'.format(name, provider)             # <<<<<<<<<<<<<<
@@ -1757,7 +1759,7 @@ struct __pyx_vtabstruct_19dependency_injector_9providers_ConfigurationOption {
 static struct __pyx_vtabstruct_19dependency_injector_9providers_ConfigurationOption *__pyx_vtabptr_19dependency_injector_9providers_ConfigurationOption;
 
 
-/* "dependency_injector/providers.pyx":1371
+/* "dependency_injector/providers.pyx":1378
  * 
  * 
  * cdef class TypedConfigurationOption(Callable):             # <<<<<<<<<<<<<<
@@ -1771,7 +1773,7 @@ struct __pyx_vtabstruct_19dependency_injector_9providers_TypedConfigurationOptio
 static struct __pyx_vtabstruct_19dependency_injector_9providers_TypedConfigurationOption *__pyx_vtabptr_19dependency_injector_9providers_TypedConfigurationOption;
 
 
-/* "dependency_injector/providers.pyx":1378
+/* "dependency_injector/providers.pyx":1385
  * 
  * 
  * cdef class Configuration(Object):             # <<<<<<<<<<<<<<
@@ -1785,7 +1787,7 @@ struct __pyx_vtabstruct_19dependency_injector_9providers_Configuration {
 static struct __pyx_vtabstruct_19dependency_injector_9providers_Configuration *__pyx_vtabptr_19dependency_injector_9providers_Configuration;
 
 
-/* "dependency_injector/providers.pyx":1637
+/* "dependency_injector/providers.pyx":1652
  * 
  * 
  * cdef class Factory(Provider):             # <<<<<<<<<<<<<<
@@ -1799,7 +1801,7 @@ struct __pyx_vtabstruct_19dependency_injector_9providers_Factory {
 static struct __pyx_vtabstruct_19dependency_injector_9providers_Factory *__pyx_vtabptr_19dependency_injector_9providers_Factory;
 
 
-/* "dependency_injector/providers.pyx":1854
+/* "dependency_injector/providers.pyx":1869
  * 
  * 
  * cdef class DelegatedFactory(Factory):             # <<<<<<<<<<<<<<
@@ -1813,7 +1815,7 @@ struct __pyx_vtabstruct_19dependency_injector_9providers_DelegatedFactory {
 static struct __pyx_vtabstruct_19dependency_injector_9providers_DelegatedFactory *__pyx_vtabptr_19dependency_injector_9providers_DelegatedFactory;
 
 
-/* "dependency_injector/providers.pyx":1876
+/* "dependency_injector/providers.pyx":1891
  * 
  * 
  * cdef class AbstractFactory(Factory):             # <<<<<<<<<<<<<<
@@ -1827,7 +1829,7 @@ struct __pyx_vtabstruct_19dependency_injector_9providers_AbstractFactory {
 static struct __pyx_vtabstruct_19dependency_injector_9providers_AbstractFactory *__pyx_vtabptr_19dependency_injector_9providers_AbstractFactory;
 
 
-/* "dependency_injector/providers.pyx":1917
+/* "dependency_injector/providers.pyx":1932
  * 
  * 
  * cdef class FactoryDelegate(Delegate):             # <<<<<<<<<<<<<<
@@ -1841,7 +1843,7 @@ struct __pyx_vtabstruct_19dependency_injector_9providers_FactoryDelegate {
 static struct __pyx_vtabstruct_19dependency_injector_9providers_FactoryDelegate *__pyx_vtabptr_19dependency_injector_9providers_FactoryDelegate;
 
 
-/* "dependency_injector/providers.pyx":1939
+/* "dependency_injector/providers.pyx":1954
  * 
  * 
  * cdef class FactoryAggregate(Provider):             # <<<<<<<<<<<<<<
@@ -1856,7 +1858,7 @@ struct __pyx_vtabstruct_19dependency_injector_9providers_FactoryAggregate {
 static struct __pyx_vtabstruct_19dependency_injector_9providers_FactoryAggregate *__pyx_vtabptr_19dependency_injector_9providers_FactoryAggregate;
 
 
-/* "dependency_injector/providers.pyx":2032
+/* "dependency_injector/providers.pyx":2047
  * 
  * 
  * cdef class BaseSingleton(Provider):             # <<<<<<<<<<<<<<
@@ -1870,7 +1872,7 @@ struct __pyx_vtabstruct_19dependency_injector_9providers_BaseSingleton {
 static struct __pyx_vtabstruct_19dependency_injector_9providers_BaseSingleton *__pyx_vtabptr_19dependency_injector_9providers_BaseSingleton;
 
 
-/* "dependency_injector/providers.pyx":2195
+/* "dependency_injector/providers.pyx":2210
  * 
  * 
  * cdef class Singleton(BaseSingleton):             # <<<<<<<<<<<<<<
@@ -1884,7 +1886,7 @@ struct __pyx_vtabstruct_19dependency_injector_9providers_Singleton {
 static struct __pyx_vtabstruct_19dependency_injector_9providers_Singleton *__pyx_vtabptr_19dependency_injector_9providers_Singleton;
 
 
-/* "dependency_injector/providers.pyx":2262
+/* "dependency_injector/providers.pyx":2277
  * 
  * 
  * cdef class DelegatedSingleton(Singleton):             # <<<<<<<<<<<<<<
@@ -1898,7 +1900,7 @@ struct __pyx_vtabstruct_19dependency_injector_9providers_DelegatedSingleton {
 static struct __pyx_vtabstruct_19dependency_injector_9providers_DelegatedSingleton *__pyx_vtabptr_19dependency_injector_9providers_DelegatedSingleton;
 
 
-/* "dependency_injector/providers.pyx":2284
+/* "dependency_injector/providers.pyx":2299
  * 
  * 
  * cdef class ThreadSafeSingleton(BaseSingleton):             # <<<<<<<<<<<<<<
@@ -1912,7 +1914,7 @@ struct __pyx_vtabstruct_19dependency_injector_9providers_ThreadSafeSingleton {
 static struct __pyx_vtabstruct_19dependency_injector_9providers_ThreadSafeSingleton *__pyx_vtabptr_19dependency_injector_9providers_ThreadSafeSingleton;
 
 
-/* "dependency_injector/providers.pyx":2335
+/* "dependency_injector/providers.pyx":2350
  * 
  * 
  * cdef class DelegatedThreadSafeSingleton(ThreadSafeSingleton):             # <<<<<<<<<<<<<<
@@ -1926,7 +1928,7 @@ struct __pyx_vtabstruct_19dependency_injector_9providers_DelegatedThreadSafeSing
 static struct __pyx_vtabstruct_19dependency_injector_9providers_DelegatedThreadSafeSingleton *__pyx_vtabptr_19dependency_injector_9providers_DelegatedThreadSafeSingleton;
 
 
-/* "dependency_injector/providers.pyx":2357
+/* "dependency_injector/providers.pyx":2372
  * 
  * 
  * cdef class ThreadLocalSingleton(BaseSingleton):             # <<<<<<<<<<<<<<
@@ -1940,7 +1942,7 @@ struct __pyx_vtabstruct_19dependency_injector_9providers_ThreadLocalSingleton {
 static struct __pyx_vtabstruct_19dependency_injector_9providers_ThreadLocalSingleton *__pyx_vtabptr_19dependency_injector_9providers_ThreadLocalSingleton;
 
 
-/* "dependency_injector/providers.pyx":2425
+/* "dependency_injector/providers.pyx":2440
  * 
  * 
  * cdef class DelegatedThreadLocalSingleton(ThreadLocalSingleton):             # <<<<<<<<<<<<<<
@@ -1954,7 +1956,7 @@ struct __pyx_vtabstruct_19dependency_injector_9providers_DelegatedThreadLocalSin
 static struct __pyx_vtabstruct_19dependency_injector_9providers_DelegatedThreadLocalSingleton *__pyx_vtabptr_19dependency_injector_9providers_DelegatedThreadLocalSingleton;
 
 
-/* "dependency_injector/providers.pyx":2447
+/* "dependency_injector/providers.pyx":2462
  * 
  * 
  * cdef class AbstractSingleton(BaseSingleton):             # <<<<<<<<<<<<<<
@@ -1968,7 +1970,7 @@ struct __pyx_vtabstruct_19dependency_injector_9providers_AbstractSingleton {
 static struct __pyx_vtabstruct_19dependency_injector_9providers_AbstractSingleton *__pyx_vtabptr_19dependency_injector_9providers_AbstractSingleton;
 
 
-/* "dependency_injector/providers.pyx":2492
+/* "dependency_injector/providers.pyx":2507
  * 
  * 
  * cdef class SingletonDelegate(Delegate):             # <<<<<<<<<<<<<<
@@ -1982,7 +1984,7 @@ struct __pyx_vtabstruct_19dependency_injector_9providers_SingletonDelegate {
 static struct __pyx_vtabstruct_19dependency_injector_9providers_SingletonDelegate *__pyx_vtabptr_19dependency_injector_9providers_SingletonDelegate;
 
 
-/* "dependency_injector/providers.pyx":2514
+/* "dependency_injector/providers.pyx":2529
  * 
  * 
  * cdef class List(Provider):             # <<<<<<<<<<<<<<
@@ -1996,7 +1998,7 @@ struct __pyx_vtabstruct_19dependency_injector_9providers_List {
 static struct __pyx_vtabstruct_19dependency_injector_9providers_List *__pyx_vtabptr_19dependency_injector_9providers_List;
 
 
-/* "dependency_injector/providers.pyx":2616
+/* "dependency_injector/providers.pyx":2631
  * 
  * 
  * cdef class Dict(Provider):             # <<<<<<<<<<<<<<
@@ -2010,7 +2012,7 @@ struct __pyx_vtabstruct_19dependency_injector_9providers_Dict {
 static struct __pyx_vtabstruct_19dependency_injector_9providers_Dict *__pyx_vtabptr_19dependency_injector_9providers_Dict;
 
 
-/* "dependency_injector/providers.pyx":2728
+/* "dependency_injector/providers.pyx":2743
  * 
  * 
  * cdef class Resource(Provider):             # <<<<<<<<<<<<<<
@@ -2024,7 +2026,7 @@ struct __pyx_vtabstruct_19dependency_injector_9providers_Resource {
 static struct __pyx_vtabstruct_19dependency_injector_9providers_Resource *__pyx_vtabptr_19dependency_injector_9providers_Resource;
 
 
-/* "dependency_injector/providers.pyx":3030
+/* "dependency_injector/providers.pyx":3045
  * 
  * 
  * cdef class Container(Provider):             # <<<<<<<<<<<<<<
@@ -2038,7 +2040,7 @@ struct __pyx_vtabstruct_19dependency_injector_9providers_Container {
 static struct __pyx_vtabstruct_19dependency_injector_9providers_Container *__pyx_vtabptr_19dependency_injector_9providers_Container;
 
 
-/* "dependency_injector/providers.pyx":3099
+/* "dependency_injector/providers.pyx":3114
  * 
  * 
  * cdef class Selector(Provider):             # <<<<<<<<<<<<<<
@@ -2052,7 +2054,7 @@ struct __pyx_vtabstruct_19dependency_injector_9providers_Selector {
 static struct __pyx_vtabstruct_19dependency_injector_9providers_Selector *__pyx_vtabptr_19dependency_injector_9providers_Selector;
 
 
-/* "dependency_injector/providers.pyx":3196
+/* "dependency_injector/providers.pyx":3211
  * 
  * 
  * cdef class ProvidedInstance(Provider):             # <<<<<<<<<<<<<<
@@ -2066,7 +2068,7 @@ struct __pyx_vtabstruct_19dependency_injector_9providers_ProvidedInstance {
 static struct __pyx_vtabstruct_19dependency_injector_9providers_ProvidedInstance *__pyx_vtabptr_19dependency_injector_9providers_ProvidedInstance;
 
 
-/* "dependency_injector/providers.pyx":3263
+/* "dependency_injector/providers.pyx":3278
  * 
  * 
  * cdef class AttributeGetter(Provider):             # <<<<<<<<<<<<<<
@@ -2080,7 +2082,7 @@ struct __pyx_vtabstruct_19dependency_injector_9providers_AttributeGetter {
 static struct __pyx_vtabstruct_19dependency_injector_9providers_AttributeGetter *__pyx_vtabptr_19dependency_injector_9providers_AttributeGetter;
 
 
-/* "dependency_injector/providers.pyx":3323
+/* "dependency_injector/providers.pyx":3338
  * 
  * 
  * cdef class ItemGetter(Provider):             # <<<<<<<<<<<<<<
@@ -2094,7 +2096,7 @@ struct __pyx_vtabstruct_19dependency_injector_9providers_ItemGetter {
 static struct __pyx_vtabstruct_19dependency_injector_9providers_ItemGetter *__pyx_vtabptr_19dependency_injector_9providers_ItemGetter;
 
 
-/* "dependency_injector/providers.pyx":3383
+/* "dependency_injector/providers.pyx":3398
  * 
  * 
  * cdef class MethodCaller(Provider):             # <<<<<<<<<<<<<<
@@ -3277,6 +3279,7 @@ static const char __pyx_k_reduce[] = "__reduce__";
 static const char __pyx_k_result[] = "result";
 static const char __pyx_k_stderr[] = "stderr";
 static const char __pyx_k_stdout[] = "stdout";
+static const char __pyx_k_strict[] = "strict";
 static const char __pyx_k_update[] = "update";
 static const char __pyx_k_values[] = "values";
 static const char __pyx_k_Factory[] = "Factory";
@@ -3320,6 +3323,7 @@ static const char __pyx_k_provides[] = "provides";
 static const char __pyx_k_pyx_capi[] = "__pyx_capi__";
 static const char __pyx_k_pyx_type[] = "__pyx_type";
 static const char __pyx_k_qualname[] = "__qualname__";
+static const char __pyx_k_required[] = "required";
 static const char __pyx_k_sections[] = "sections";
 static const char __pyx_k_selector[] = "selector";
 static const char __pyx_k_set_args[] = "set_args";
@@ -3551,17 +3555,16 @@ static const char __pyx_k_Configuration_option_does_not_su[] = "Configuration op
 static const char __pyx_k_Container_provider_0_can_be_over[] = "Container provider {0} can be overridden only by providers container";
 static const char __pyx_k_Expected_provider_instance_got_0[] = "Expected provider instance, got {0}";
 static const char __pyx_k_Factory_missing_1_required_posit[] = "Factory missing 1 required positional argument: 'factory_name'";
+static const char __pyx_k_Incompatible_checksums_s_vs_0x10[] = "Incompatible checksums (%s vs 0x101ecef = (__async_mode, __cache, __children, __last_overriding, __name, __overridden, __required, __root_ref))";
 static const char __pyx_k_Incompatible_checksums_s_vs_0x1b[] = "Incompatible checksums (%s vs 0x1bd47ec = (__async_mode, __container, __container_cls, __last_overriding, __overridden, __overriding_providers))";
 static const char __pyx_k_Incompatible_checksums_s_vs_0x1c[] = "Incompatible checksums (%s vs 0x1cf9f6d = (__async_mode, __last_overriding, __overridden, __providers, __provides))";
 static const char __pyx_k_Incompatible_checksums_s_vs_0x20[] = "Incompatible checksums (%s vs 0x2071b6b = (__overridden, __overriding))";
 static const char __pyx_k_Incompatible_checksums_s_vs_0x2a[] = "Incompatible checksums (%s vs 0x2a56a3c = (__async_mode, __instantiator, __last_overriding, __overridden, __storage, __storage_lock))";
 static const char __pyx_k_Incompatible_checksums_s_vs_0x2e[] = "Incompatible checksums (%s vs 0x2e1d18f = (__call, __is_delegated, __is_provider, __value))";
 static const char __pyx_k_Incompatible_checksums_s_vs_0x32[] = "Incompatible checksums (%s vs 0x328787b = (__async_mode, __last_overriding, __overridden, __provides))";
-static const char __pyx_k_Incompatible_checksums_s_vs_0x34[] = "Incompatible checksums (%s vs 0x3460d23 = (__async_mode, __children, __last_overriding, __name, __overridden, __provides))";
 static const char __pyx_k_Incompatible_checksums_s_vs_0x3e[] = "Incompatible checksums (%s vs 0x3e02ba6 = (__args, __args_len, __async_mode, __kwargs, __kwargs_len, __last_overriding, __overridden, __provides))";
-static const char __pyx_k_Incompatible_checksums_s_vs_0x42[] = "Incompatible checksums (%s vs 0x42b6146 = (__args, __args_len, __async_mode, __last_overriding, __overridden))";
+static const char __pyx_k_Incompatible_checksums_s_vs_0x42[] = "Incompatible checksums (%s vs 0x42fe861 = (__async_mode, __children, __last_overriding, __name, __overridden, __provides, __strict))";
 static const char __pyx_k_Incompatible_checksums_s_vs_0x64[] = "Incompatible checksums (%s vs 0x64f395f = (__call, __is_delegated, __is_provider, __name, __value))";
-static const char __pyx_k_Incompatible_checksums_s_vs_0x66[] = "Incompatible checksums (%s vs 0x66bc620 = (__async_mode, __cache, __children, __last_overriding, __name, __overridden, __root_ref))";
 static const char __pyx_k_Incompatible_checksums_s_vs_0x6a[] = "Incompatible checksums (%s vs 0x6a94d6b = (__async_mode, __last_overriding, __overridden, __providers, __selector))";
 static const char __pyx_k_Incompatible_checksums_s_vs_0x73[] = "Incompatible checksums (%s vs 0x734cfcb = (__args, __args_len, __async_mode, __initialized, __initializer, __kwargs, __kwargs_len, __last_overriding, __overridden, __resource, __shutdowner))";
 static const char __pyx_k_Incompatible_checksums_s_vs_0x75[] = "Incompatible checksums (%s vs 0x7545337 = (__async_mode, __attributes, __attributes_len, __instantiator, __last_overriding, __overridden))";
@@ -3581,8 +3584,10 @@ static const char __pyx_k_Provider_0_could_not_be_overridd[] = "Provider {0} cou
 static const char __pyx_k_Provider_0_expected_to_get_calla[] = "Provider {0} expected to get callable, got {0}";
 static const char __pyx_k_Provider_0_expected_to_get_corou[] = "Provider {0} expected to get coroutine function, got {1}";
 static const char __pyx_k_Unable_to_load_yaml_configuratio[] = "Unable to load yaml configuration - PyYAML is not installed. Install PyYAML or install Dependency Injector with yaml extras: \"pip install dependency-injector[yaml]\"";
+static const char __pyx_k_Undefined_configuration_option_0[] = "Undefined configuration option \"{0}.{1}\"";
 static const char __pyx_k_Unknown_type_of_resource_initial[] = "Unknown type of resource initializer";
 static const char __pyx_k_src_dependency_injector_provider[] = "src/dependency_injector/providers.pyx";
+static const char __pyx_k_Incompatible_checksums_s_vs_0x42_2[] = "Incompatible checksums (%s vs 0x42b6146 = (__args, __args_len, __async_mode, __last_overriding, __overridden))";
 static PyObject *__pyx_n_s_;
 static PyObject *__pyx_kp_s_0_1;
 static PyObject *__pyx_kp_s_0_can_aggregate_only_instances;
@@ -3646,17 +3651,17 @@ static PyObject *__pyx_n_s_IOError;
 static PyObject *__pyx_n_s_IS_DELEGATED;
 static PyObject *__pyx_n_s_IS_PROVIDER;
 static PyObject *__pyx_n_s_ImportError;
+static PyObject *__pyx_kp_s_Incompatible_checksums_s_vs_0x10;
 static PyObject *__pyx_kp_s_Incompatible_checksums_s_vs_0x1b;
 static PyObject *__pyx_kp_s_Incompatible_checksums_s_vs_0x1c;
 static PyObject *__pyx_kp_s_Incompatible_checksums_s_vs_0x20;
 static PyObject *__pyx_kp_s_Incompatible_checksums_s_vs_0x2a;
 static PyObject *__pyx_kp_s_Incompatible_checksums_s_vs_0x2e;
 static PyObject *__pyx_kp_s_Incompatible_checksums_s_vs_0x32;
-static PyObject *__pyx_kp_s_Incompatible_checksums_s_vs_0x34;
 static PyObject *__pyx_kp_s_Incompatible_checksums_s_vs_0x3e;
 static PyObject *__pyx_kp_s_Incompatible_checksums_s_vs_0x42;
+static PyObject *__pyx_kp_s_Incompatible_checksums_s_vs_0x42_2;
 static PyObject *__pyx_kp_s_Incompatible_checksums_s_vs_0x64;
-static PyObject *__pyx_kp_s_Incompatible_checksums_s_vs_0x66;
 static PyObject *__pyx_kp_s_Incompatible_checksums_s_vs_0x6a;
 static PyObject *__pyx_kp_s_Incompatible_checksums_s_vs_0x73;
 static PyObject *__pyx_kp_s_Incompatible_checksums_s_vs_0x75;
@@ -3710,6 +3715,7 @@ static PyObject *__pyx_n_s_TypeError;
 static PyObject *__pyx_n_s_TypedConfigurationOption;
 static PyObject *__pyx_n_s_UNDEFINED;
 static PyObject *__pyx_kp_s_Unable_to_load_yaml_configuratio;
+static PyObject *__pyx_kp_s_Undefined_configuration_option_0;
 static PyObject *__pyx_kp_s_Unknown_type_of_resource_initial;
 static PyObject *__pyx_kp_u__10;
 static PyObject *__pyx_n_s__12;
@@ -3938,6 +3944,7 @@ static PyObject *__pyx_n_s_reduce;
 static PyObject *__pyx_n_s_reduce_cython;
 static PyObject *__pyx_n_s_reduce_ex;
 static PyObject *__pyx_n_s_ref;
+static PyObject *__pyx_n_s_required;
 static PyObject *__pyx_n_s_reset;
 static PyObject *__pyx_n_s_reset_cache;
 static PyObject *__pyx_n_s_reset_last_overriding;
@@ -3971,6 +3978,7 @@ static PyObject *__pyx_n_s_stdout;
 static PyObject *__pyx_n_s_storage_lock;
 static PyObject *__pyx_n_s_str;
 static PyObject *__pyx_n_s_str___locals_genexpr;
+static PyObject *__pyx_n_s_strict;
 static PyObject *__pyx_kp_s_stringsource;
 static PyObject *__pyx_n_s_super;
 static PyObject *__pyx_n_s_sys;
@@ -4101,7 +4109,7 @@ static PyObject *__pyx_pf_19dependency_injector_9providers_17AbstractCoroutine_8
 static int __pyx_pf_19dependency_injector_9providers_17CoroutineDelegate___init__(struct __pyx_obj_19dependency_injector_9providers_CoroutineDelegate *__pyx_v_self, PyObject *__pyx_v_coroutine); /* proto */
 static PyObject *__pyx_pf_19dependency_injector_9providers_17CoroutineDelegate_2__reduce_cython__(struct __pyx_obj_19dependency_injector_9providers_CoroutineDelegate *__pyx_v_self); /* proto */
 static PyObject *__pyx_pf_19dependency_injector_9providers_17CoroutineDelegate_4__setstate_cython__(struct __pyx_obj_19dependency_injector_9providers_CoroutineDelegate *__pyx_v_self, PyObject *__pyx_v___pyx_state); /* proto */
-static int __pyx_pf_19dependency_injector_9providers_19ConfigurationOption___init__(struct __pyx_obj_19dependency_injector_9providers_ConfigurationOption *__pyx_v_self, PyObject *__pyx_v_name, PyObject *__pyx_v_root); /* proto */
+static int __pyx_pf_19dependency_injector_9providers_19ConfigurationOption___init__(struct __pyx_obj_19dependency_injector_9providers_ConfigurationOption *__pyx_v_self, PyObject *__pyx_v_name, PyObject *__pyx_v_root, PyObject *__pyx_v_required); /* proto */
 static PyObject *__pyx_pf_19dependency_injector_9providers_19ConfigurationOption_2__deepcopy__(struct __pyx_obj_19dependency_injector_9providers_ConfigurationOption *__pyx_v_self, PyObject *__pyx_v_memo); /* proto */
 static PyObject *__pyx_pf_19dependency_injector_9providers_19ConfigurationOption_4__str__(struct __pyx_obj_19dependency_injector_9providers_ConfigurationOption *__pyx_v_self); /* proto */
 static PyObject *__pyx_pf_19dependency_injector_9providers_19ConfigurationOption_6__getattr__(struct __pyx_obj_19dependency_injector_9providers_ConfigurationOption *__pyx_v_self, PyObject *__pyx_v_item); /* proto */
@@ -4115,27 +4123,29 @@ static PyObject *__pyx_pf_19dependency_injector_9providers_19ConfigurationOption
 static PyObject *__pyx_pf_19dependency_injector_9providers_19ConfigurationOption_18as_int(struct __pyx_obj_19dependency_injector_9providers_ConfigurationOption *__pyx_v_self); /* proto */
 static PyObject *__pyx_pf_19dependency_injector_9providers_19ConfigurationOption_20as_float(struct __pyx_obj_19dependency_injector_9providers_ConfigurationOption *__pyx_v_self); /* proto */
 static PyObject *__pyx_pf_19dependency_injector_9providers_19ConfigurationOption_22as_(struct __pyx_obj_19dependency_injector_9providers_ConfigurationOption *__pyx_v_self, PyObject *__pyx_v_callback, PyObject *__pyx_v_args, PyObject *__pyx_v_kwargs); /* proto */
-static PyObject *__pyx_pf_19dependency_injector_9providers_19ConfigurationOption_24override(struct __pyx_obj_19dependency_injector_9providers_ConfigurationOption *__pyx_v_self, PyObject *__pyx_v_value); /* proto */
-static PyObject *__pyx_pf_19dependency_injector_9providers_19ConfigurationOption_26reset_last_overriding(CYTHON_UNUSED struct __pyx_obj_19dependency_injector_9providers_ConfigurationOption *__pyx_v_self); /* proto */
-static PyObject *__pyx_pf_19dependency_injector_9providers_19ConfigurationOption_28reset_override(CYTHON_UNUSED struct __pyx_obj_19dependency_injector_9providers_ConfigurationOption *__pyx_v_self); /* proto */
-static PyObject *__pyx_pf_19dependency_injector_9providers_19ConfigurationOption_30reset_cache(struct __pyx_obj_19dependency_injector_9providers_ConfigurationOption *__pyx_v_self); /* proto */
-static PyObject *__pyx_pf_19dependency_injector_9providers_19ConfigurationOption_32update(struct __pyx_obj_19dependency_injector_9providers_ConfigurationOption *__pyx_v_self, PyObject *__pyx_v_value); /* proto */
-static PyObject *__pyx_pf_19dependency_injector_9providers_19ConfigurationOption_34from_ini(struct __pyx_obj_19dependency_injector_9providers_ConfigurationOption *__pyx_v_self, PyObject *__pyx_v_filepath); /* proto */
-static PyObject *__pyx_pf_19dependency_injector_9providers_19ConfigurationOption_36from_yaml(struct __pyx_obj_19dependency_injector_9providers_ConfigurationOption *__pyx_v_self, PyObject *__pyx_v_filepath); /* proto */
-static PyObject *__pyx_pf_19dependency_injector_9providers_19ConfigurationOption_38from_dict(struct __pyx_obj_19dependency_injector_9providers_ConfigurationOption *__pyx_v_self, PyObject *__pyx_v_options); /* proto */
-static PyObject *__pyx_pf_19dependency_injector_9providers_19ConfigurationOption_40from_env(struct __pyx_obj_19dependency_injector_9providers_ConfigurationOption *__pyx_v_self, PyObject *__pyx_v_name, PyObject *__pyx_v_default); /* proto */
-static PyObject *__pyx_pf_19dependency_injector_9providers_19ConfigurationOption_42__reduce_cython__(struct __pyx_obj_19dependency_injector_9providers_ConfigurationOption *__pyx_v_self); /* proto */
-static PyObject *__pyx_pf_19dependency_injector_9providers_19ConfigurationOption_44__setstate_cython__(struct __pyx_obj_19dependency_injector_9providers_ConfigurationOption *__pyx_v_self, PyObject *__pyx_v___pyx_state); /* proto */
+static PyObject *__pyx_pf_19dependency_injector_9providers_19ConfigurationOption_24required(struct __pyx_obj_19dependency_injector_9providers_ConfigurationOption *__pyx_v_self); /* proto */
+static PyObject *__pyx_pf_19dependency_injector_9providers_19ConfigurationOption_26is_required(struct __pyx_obj_19dependency_injector_9providers_ConfigurationOption *__pyx_v_self); /* proto */
+static PyObject *__pyx_pf_19dependency_injector_9providers_19ConfigurationOption_28override(struct __pyx_obj_19dependency_injector_9providers_ConfigurationOption *__pyx_v_self, PyObject *__pyx_v_value); /* proto */
+static PyObject *__pyx_pf_19dependency_injector_9providers_19ConfigurationOption_30reset_last_overriding(CYTHON_UNUSED struct __pyx_obj_19dependency_injector_9providers_ConfigurationOption *__pyx_v_self); /* proto */
+static PyObject *__pyx_pf_19dependency_injector_9providers_19ConfigurationOption_32reset_override(CYTHON_UNUSED struct __pyx_obj_19dependency_injector_9providers_ConfigurationOption *__pyx_v_self); /* proto */
+static PyObject *__pyx_pf_19dependency_injector_9providers_19ConfigurationOption_34reset_cache(struct __pyx_obj_19dependency_injector_9providers_ConfigurationOption *__pyx_v_self); /* proto */
+static PyObject *__pyx_pf_19dependency_injector_9providers_19ConfigurationOption_36update(struct __pyx_obj_19dependency_injector_9providers_ConfigurationOption *__pyx_v_self, PyObject *__pyx_v_value); /* proto */
+static PyObject *__pyx_pf_19dependency_injector_9providers_19ConfigurationOption_38from_ini(struct __pyx_obj_19dependency_injector_9providers_ConfigurationOption *__pyx_v_self, PyObject *__pyx_v_filepath); /* proto */
+static PyObject *__pyx_pf_19dependency_injector_9providers_19ConfigurationOption_40from_yaml(struct __pyx_obj_19dependency_injector_9providers_ConfigurationOption *__pyx_v_self, PyObject *__pyx_v_filepath); /* proto */
+static PyObject *__pyx_pf_19dependency_injector_9providers_19ConfigurationOption_42from_dict(struct __pyx_obj_19dependency_injector_9providers_ConfigurationOption *__pyx_v_self, PyObject *__pyx_v_options); /* proto */
+static PyObject *__pyx_pf_19dependency_injector_9providers_19ConfigurationOption_44from_env(struct __pyx_obj_19dependency_injector_9providers_ConfigurationOption *__pyx_v_self, PyObject *__pyx_v_name, PyObject *__pyx_v_default); /* proto */
+static PyObject *__pyx_pf_19dependency_injector_9providers_19ConfigurationOption_46__reduce_cython__(struct __pyx_obj_19dependency_injector_9providers_ConfigurationOption *__pyx_v_self); /* proto */
+static PyObject *__pyx_pf_19dependency_injector_9providers_19ConfigurationOption_48__setstate_cython__(struct __pyx_obj_19dependency_injector_9providers_ConfigurationOption *__pyx_v_self, PyObject *__pyx_v___pyx_state); /* proto */
 static PyObject *__pyx_pf_19dependency_injector_9providers_24TypedConfigurationOption_6option___get__(struct __pyx_obj_19dependency_injector_9providers_TypedConfigurationOption *__pyx_v_self); /* proto */
 static PyObject *__pyx_pf_19dependency_injector_9providers_24TypedConfigurationOption___reduce_cython__(struct __pyx_obj_19dependency_injector_9providers_TypedConfigurationOption *__pyx_v_self); /* proto */
 static PyObject *__pyx_pf_19dependency_injector_9providers_24TypedConfigurationOption_2__setstate_cython__(struct __pyx_obj_19dependency_injector_9providers_TypedConfigurationOption *__pyx_v_self, PyObject *__pyx_v___pyx_state); /* proto */
-static int __pyx_pf_19dependency_injector_9providers_13Configuration___init__(struct __pyx_obj_19dependency_injector_9providers_Configuration *__pyx_v_self, PyObject *__pyx_v_name, PyObject *__pyx_v_default); /* proto */
+static int __pyx_pf_19dependency_injector_9providers_13Configuration___init__(struct __pyx_obj_19dependency_injector_9providers_Configuration *__pyx_v_self, PyObject *__pyx_v_name, PyObject *__pyx_v_default, PyObject *__pyx_v_strict); /* proto */
 static PyObject *__pyx_pf_19dependency_injector_9providers_13Configuration_2__deepcopy__(struct __pyx_obj_19dependency_injector_9providers_Configuration *__pyx_v_self, PyObject *__pyx_v_memo); /* proto */
 static PyObject *__pyx_pf_19dependency_injector_9providers_13Configuration_4__str__(struct __pyx_obj_19dependency_injector_9providers_Configuration *__pyx_v_self); /* proto */
 static PyObject *__pyx_pf_19dependency_injector_9providers_13Configuration_6__getattr__(struct __pyx_obj_19dependency_injector_9providers_Configuration *__pyx_v_self, PyObject *__pyx_v_item); /* proto */
 static PyObject *__pyx_pf_19dependency_injector_9providers_13Configuration_8__getitem__(struct __pyx_obj_19dependency_injector_9providers_Configuration *__pyx_v_self, PyObject *__pyx_v_item); /* proto */
 static PyObject *__pyx_pf_19dependency_injector_9providers_13Configuration_10get_name(struct __pyx_obj_19dependency_injector_9providers_Configuration *__pyx_v_self); /* proto */
-static PyObject *__pyx_pf_19dependency_injector_9providers_13Configuration_12get(struct __pyx_obj_19dependency_injector_9providers_Configuration *__pyx_v_self, PyObject *__pyx_v_selector); /* proto */
+static PyObject *__pyx_pf_19dependency_injector_9providers_13Configuration_12get(struct __pyx_obj_19dependency_injector_9providers_Configuration *__pyx_v_self, PyObject *__pyx_v_selector, PyObject *__pyx_v_required); /* proto */
 static PyObject *__pyx_pf_19dependency_injector_9providers_13Configuration_14set(struct __pyx_obj_19dependency_injector_9providers_Configuration *__pyx_v_self, PyObject *__pyx_v_selector, PyObject *__pyx_v_value); /* proto */
 static PyObject *__pyx_pf_19dependency_injector_9providers_13Configuration_16override(struct __pyx_obj_19dependency_injector_9providers_Configuration *__pyx_v_self, PyObject *__pyx_v_provider); /* proto */
 static PyObject *__pyx_pf_19dependency_injector_9providers_13Configuration_18reset_last_overriding(struct __pyx_obj_19dependency_injector_9providers_Configuration *__pyx_v_self); /* proto */
@@ -4475,17 +4485,17 @@ static PyObject *__pyx_int_0;
 static PyObject *__pyx_int_2;
 static PyObject *__pyx_int_3;
 static PyObject *__pyx_int_5;
+static PyObject *__pyx_int_16903407;
 static PyObject *__pyx_int_29181932;
 static PyObject *__pyx_int_30383981;
 static PyObject *__pyx_int_34020203;
 static PyObject *__pyx_int_44395068;
 static PyObject *__pyx_int_48353679;
 static PyObject *__pyx_int_52983931;
-static PyObject *__pyx_int_54922531;
 static PyObject *__pyx_int_65022886;
 static PyObject *__pyx_int_69951814;
+static PyObject *__pyx_int_70248545;
 static PyObject *__pyx_int_105855327;
-static PyObject *__pyx_int_107726368;
 static PyObject *__pyx_int_111758699;
 static PyObject *__pyx_int_120901579;
 static PyObject *__pyx_int_122966839;
@@ -23671,7 +23681,7 @@ static PyObject *__pyx_pf_19dependency_injector_9providers_17CoroutineDelegate_4
 /* "dependency_injector/providers.pyx":1175
  *     UNDEFINED = object()
  * 
- *     def __init__(self, name, root):             # <<<<<<<<<<<<<<
+ *     def __init__(self, name, root, required=False):             # <<<<<<<<<<<<<<
  *         self.__name = name
  *         self.__root_ref = weakref.ref(root)
  */
@@ -23681,6 +23691,7 @@ static int __pyx_pw_19dependency_injector_9providers_19ConfigurationOption_1__in
 static int __pyx_pw_19dependency_injector_9providers_19ConfigurationOption_1__init__(PyObject *__pyx_v_self, PyObject *__pyx_args, PyObject *__pyx_kwds) {
   PyObject *__pyx_v_name = 0;
   PyObject *__pyx_v_root = 0;
+  PyObject *__pyx_v_required = 0;
   int __pyx_lineno = 0;
   const char *__pyx_filename = NULL;
   int __pyx_clineno = 0;
@@ -23688,12 +23699,15 @@ static int __pyx_pw_19dependency_injector_9providers_19ConfigurationOption_1__in
   __Pyx_RefNannyDeclarations
   __Pyx_RefNannySetupContext("__init__ (wrapper)", 0);
   {
-    static PyObject **__pyx_pyargnames[] = {&__pyx_n_s_name_2,&__pyx_n_s_root,0};
-    PyObject* values[2] = {0,0};
+    static PyObject **__pyx_pyargnames[] = {&__pyx_n_s_name_2,&__pyx_n_s_root,&__pyx_n_s_required,0};
+    PyObject* values[3] = {0,0,0};
+    values[2] = ((PyObject *)Py_False);
     if (unlikely(__pyx_kwds)) {
       Py_ssize_t kw_args;
       const Py_ssize_t pos_args = PyTuple_GET_SIZE(__pyx_args);
       switch (pos_args) {
+        case  3: values[2] = PyTuple_GET_ITEM(__pyx_args, 2);
+        CYTHON_FALLTHROUGH;
         case  2: values[1] = PyTuple_GET_ITEM(__pyx_args, 1);
         CYTHON_FALLTHROUGH;
         case  1: values[0] = PyTuple_GET_ITEM(__pyx_args, 0);
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-  /* "dependency_injector/providers.pyx":1463
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@@ -29785,7 +30127,7 @@ static PyObject *__pyx_pf_19dependency_injector_9providers_13Configuration_12get
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@@ -29794,90 +30136,231 @@ static PyObject *__pyx_pf_19dependency_injector_9providers_13Configuration_12get
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-  /* "dependency_injector/providers.pyx":1474
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-          /* "dependency_injector/providers.pyx":2015
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@@ -41761,7 +42252,7 @@ static PyObject *__pyx_f_19dependency_injector_9providers_9Singleton__provide(st
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@@ -41770,14 +42261,14 @@ static PyObject *__pyx_f_19dependency_injector_9providers_9Singleton__provide(st
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@@ -41788,7 +42279,7 @@ static PyObject *__pyx_f_19dependency_injector_9providers_9Singleton__provide(st
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-      /* "dependency_injector/providers.pyx":2250
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@@ -41845,7 +42336,7 @@ static PyObject *__pyx_f_19dependency_injector_9providers_9Singleton__provide(st
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-    /* "dependency_injector/providers.pyx":2247
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+      __Pyx_GetModuleGlobalName(__pyx_t_3, __pyx_n_s_asyncio); if (unlikely(!__pyx_t_3)) __PYX_ERR(1, 2883, __pyx_L1_error)
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+      __pyx_t_4 = __Pyx_PyObject_GetAttrStr(__pyx_t_3, __pyx_n_s_Future); if (unlikely(!__pyx_t_4)) __PYX_ERR(1, 2883, __pyx_L1_error)
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@@ -52627,20 +53118,20 @@ static PyObject *__pyx_pf_19dependency_injector_9providers_8Resource_20shutdown(
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-      if (unlikely(!__pyx_t_2)) __PYX_ERR(1, 2868, __pyx_L1_error)
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-      /* "dependency_injector/providers.pyx":2869
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-      __pyx_t_4 = __Pyx_PyObject_GetAttrStr(__pyx_v_result, __pyx_n_s_set_result); if (unlikely(!__pyx_t_4)) __PYX_ERR(1, 2869, __pyx_L1_error)
+      __pyx_t_4 = __Pyx_PyObject_GetAttrStr(__pyx_v_result, __pyx_n_s_set_result); if (unlikely(!__pyx_t_4)) __PYX_ERR(1, 2884, __pyx_L1_error)
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@@ -52654,12 +53145,12 @@ static PyObject *__pyx_pf_19dependency_injector_9providers_8Resource_20shutdown(
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-      if (unlikely(!__pyx_t_2)) __PYX_ERR(1, 2869, __pyx_L1_error)
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-      /* "dependency_injector/providers.pyx":2870
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@@ -52671,7 +53162,7 @@ static PyObject *__pyx_pf_19dependency_injector_9providers_8Resource_20shutdown(
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-      /* "dependency_injector/providers.pyx":2867
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@@ -52680,7 +53171,7 @@ static PyObject *__pyx_pf_19dependency_injector_9providers_8Resource_20shutdown(
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@@ -52691,7 +53182,7 @@ static PyObject *__pyx_pf_19dependency_injector_9providers_8Resource_20shutdown(
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-    /* "dependency_injector/providers.pyx":2866
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@@ -52700,17 +53191,17 @@ static PyObject *__pyx_pf_19dependency_injector_9providers_8Resource_20shutdown(
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@@ -52726,7 +53217,7 @@ static PyObject *__pyx_pf_19dependency_injector_9providers_8Resource_20shutdown(
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@@ -52746,13 +53237,13 @@ static PyObject *__pyx_pf_19dependency_injector_9providers_8Resource_20shutdown(
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-        /* "dependency_injector/providers.pyx":2874
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@@ -52761,7 +53252,7 @@ static PyObject *__pyx_pf_19dependency_injector_9providers_8Resource_20shutdown(
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       }
 
-      /* "dependency_injector/providers.pyx":2879
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@@ -52769,9 +53260,9 @@ static PyObject *__pyx_pf_19dependency_injector_9providers_8Resource_20shutdown(
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+        __Pyx_GetModuleGlobalName(__pyx_t_4, __pyx_n_s_inspect); if (unlikely(!__pyx_t_4)) __PYX_ERR(1, 2894, __pyx_L8_except_error)
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@@ -52786,14 +53277,14 @@ static PyObject *__pyx_pf_19dependency_injector_9providers_8Resource_20shutdown(
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-          /* "dependency_injector/providers.pyx":2880
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@@ -52801,7 +53292,7 @@ static PyObject *__pyx_pf_19dependency_injector_9providers_8Resource_20shutdown(
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@@ -52815,14 +53306,14 @@ static PyObject *__pyx_pf_19dependency_injector_9providers_8Resource_20shutdown(
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-          /* "dependency_injector/providers.pyx":2879
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@@ -52840,7 +53331,7 @@ static PyObject *__pyx_pf_19dependency_injector_9providers_8Resource_20shutdown(
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-      /* "dependency_injector/providers.pyx":2874
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@@ -52890,7 +53381,7 @@ static PyObject *__pyx_pf_19dependency_injector_9providers_8Resource_20shutdown(
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-  /* "dependency_injector/providers.pyx":2883
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@@ -52946,23 +53437,23 @@ static PyObject *__pyx_pf_19dependency_injector_9providers_8Resource_20shutdown(
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-  if (unlikely(!__pyx_t_2)) __PYX_ERR(1, 2886, __pyx_L1_error)
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-    /* "dependency_injector/providers.pyx":2887
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+    __Pyx_GetModuleGlobalName(__pyx_t_3, __pyx_n_s_asyncio); if (unlikely(!__pyx_t_3)) __PYX_ERR(1, 2902, __pyx_L1_error)
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+    __pyx_t_4 = __Pyx_PyObject_GetAttrStr(__pyx_t_3, __pyx_n_s_Future); if (unlikely(!__pyx_t_4)) __PYX_ERR(1, 2902, __pyx_L1_error)
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@@ -52977,20 +53468,20 @@ static PyObject *__pyx_pf_19dependency_injector_9providers_8Resource_20shutdown(
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-    if (unlikely(!__pyx_t_2)) __PYX_ERR(1, 2887, __pyx_L1_error)
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-    /* "dependency_injector/providers.pyx":2888
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+    __pyx_t_4 = __Pyx_PyObject_GetAttrStr(__pyx_v_result, __pyx_n_s_set_result); if (unlikely(!__pyx_t_4)) __PYX_ERR(1, 2903, __pyx_L1_error)
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@@ -53004,12 +53495,12 @@ static PyObject *__pyx_pf_19dependency_injector_9providers_8Resource_20shutdown(
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-    if (unlikely(!__pyx_t_2)) __PYX_ERR(1, 2888, __pyx_L1_error)
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-    /* "dependency_injector/providers.pyx":2889
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@@ -53030,7 +53521,7 @@ static PyObject *__pyx_pf_19dependency_injector_9providers_8Resource_20shutdown(
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-  /* "dependency_injector/providers.pyx":2864
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-  __pyx_t_7 = __Pyx_PyObject_IsTrue(__pyx_t_1); if (unlikely(__pyx_t_7 < 0)) __PYX_ERR(1, 2895, __pyx_L1_error)
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@@ -53238,23 +53729,23 @@ static PyObject *__pyx_f_19dependency_injector_9providers_8Resource__provide(str
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+    __pyx_t_6 = __pyx_f_19dependency_injector_9providers___call(__pyx_t_1, __pyx_v_args, ((PyObject*)__pyx_t_2), __pyx_v_self->__pyx___args_len, __pyx_v_kwargs, ((PyObject*)__pyx_t_3), __pyx_v_self->__pyx___kwargs_len); if (unlikely(!__pyx_t_6)) __PYX_ERR(1, 2912, __pyx_L1_error)
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@@ -53307,7 +53798,7 @@ static PyObject *__pyx_f_19dependency_injector_9providers_8Resource__provide(str
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@@ -53338,14 +53829,14 @@ static PyObject *__pyx_f_19dependency_injector_9providers_8Resource__provide(str
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-    /* "dependency_injector/providers.pyx":2910
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-    /* "dependency_injector/providers.pyx":2912
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     __pyx_t_3 = __pyx_v_self->__pyx___args;
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-    /* "dependency_injector/providers.pyx":2915
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-    /* "dependency_injector/providers.pyx":2909
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-    __pyx_t_1 = __pyx_f_19dependency_injector_9providers___call(__pyx_t_6, __pyx_v_args, ((PyObject*)__pyx_t_3), __pyx_v_self->__pyx___args_len, __pyx_v_kwargs, ((PyObject*)__pyx_t_2), __pyx_v_self->__pyx___kwargs_len); if (unlikely(!__pyx_t_1)) __PYX_ERR(1, 2909, __pyx_L1_error)
+    __pyx_t_1 = __pyx_f_19dependency_injector_9providers___call(__pyx_t_6, __pyx_v_args, ((PyObject*)__pyx_t_3), __pyx_v_self->__pyx___args_len, __pyx_v_kwargs, ((PyObject*)__pyx_t_2), __pyx_v_self->__pyx___kwargs_len); if (unlikely(!__pyx_t_1)) __PYX_ERR(1, 2924, __pyx_L1_error)
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@@ -53416,7 +53907,7 @@ static PyObject *__pyx_f_19dependency_injector_9providers_8Resource__provide(str
     __pyx_v_async_init = __pyx_t_1;
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-    /* "dependency_injector/providers.pyx":2919
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+    __pyx_t_2 = __Pyx_PyObject_GetAttrStr(((PyObject *)__pyx_v_self), __pyx_n_s_create_init_future); if (unlikely(!__pyx_t_2)) __PYX_ERR(1, 2934, __pyx_L1_error)
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+    __pyx_t_3 = __Pyx_PyObject_GetAttrStr(__pyx_v_initializer, __pyx_n_s_shutdown); if (unlikely(!__pyx_t_3)) __PYX_ERR(1, 2934, __pyx_L1_error)
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@@ -53452,7 +53943,7 @@ static PyObject *__pyx_f_19dependency_injector_9providers_8Resource__provide(str
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@@ -53823,9 +54314,9 @@ static PyObject *__pyx_f_19dependency_injector_9providers_8Resource__provide(str
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@@ -53839,10 +54330,10 @@ static PyObject *__pyx_f_19dependency_injector_9providers_8Resource__provide(str
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@@ -53859,7 +54350,7 @@ static PyObject *__pyx_f_19dependency_injector_9providers_8Resource__provide(str
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@@ -53869,7 +54360,7 @@ static PyObject *__pyx_f_19dependency_injector_9providers_8Resource__provide(str
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@@ -53877,7 +54368,7 @@ static PyObject *__pyx_f_19dependency_injector_9providers_8Resource__provide(str
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-      __pyx_t_8 = PyTuple_New(2+__pyx_t_5); if (unlikely(!__pyx_t_8)) __PYX_ERR(1, 2955, __pyx_L1_error)
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@@ -53888,7 +54379,7 @@ static PyObject *__pyx_f_19dependency_injector_9providers_8Resource__provide(str
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-    /* "dependency_injector/providers.pyx":2958
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+    __pyx_t_1 = __pyx_f_19dependency_injector_9providers___call(__pyx_t_3, __pyx_v_args, ((PyObject*)__pyx_t_2), __pyx_v_self->__pyx___args_len, __pyx_v_kwargs, ((PyObject*)__pyx_t_8), __pyx_v_self->__pyx___kwargs_len); if (unlikely(!__pyx_t_1)) __PYX_ERR(1, 2972, __pyx_L1_error)
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@@ -54000,16 +54491,16 @@ static PyObject *__pyx_f_19dependency_injector_9providers_8Resource__provide(str
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@@ -65850,14 +66341,14 @@ static PyObject *__pyx_f_19dependency_injector_9providers_12MethodCaller__provid
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@@ -65874,7 +66365,7 @@ static PyObject *__pyx_f_19dependency_injector_9providers_12MethodCaller__provid
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-  /* "dependency_injector/providers.pyx":3518
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-  /* "dependency_injector/providers.pyx":3631
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  *     try:             # <<<<<<<<<<<<<<
@@ -70774,7 +71265,7 @@ static PyObject *__pyx_pf_19dependency_injector_9providers_24isawaitable(CYTHON_
     __Pyx_XDECREF(__pyx_t_5); __pyx_t_5 = 0;
     __Pyx_XDECREF(__pyx_t_6); __pyx_t_6 = 0;
 
-    /* "dependency_injector/providers.pyx":3701
+    /* "dependency_injector/providers.pyx":3716
  *     try:
  *         return inspect.isawaitable(obj)
  *     except AttributeError:             # <<<<<<<<<<<<<<
@@ -70784,12 +71275,12 @@ static PyObject *__pyx_pf_19dependency_injector_9providers_24isawaitable(CYTHON_
     __pyx_t_7 = __Pyx_PyErr_ExceptionMatches(__pyx_builtin_AttributeError);
     if (__pyx_t_7) {
       __Pyx_AddTraceback("dependency_injector.providers.isawaitable", __pyx_clineno, __pyx_lineno, __pyx_filename);
-      if (__Pyx_GetException(&__pyx_t_4, &__pyx_t_6, &__pyx_t_5) < 0) __PYX_ERR(1, 3701, __pyx_L5_except_error)
+      if (__Pyx_GetException(&__pyx_t_4, &__pyx_t_6, &__pyx_t_5) < 0) __PYX_ERR(1, 3716, __pyx_L5_except_error)
       __Pyx_GOTREF(__pyx_t_4);
       __Pyx_GOTREF(__pyx_t_6);
       __Pyx_GOTREF(__pyx_t_5);
 
-      /* "dependency_injector/providers.pyx":3702
+      /* "dependency_injector/providers.pyx":3717
  *         return inspect.isawaitable(obj)
  *     except AttributeError:
  *         return False             # <<<<<<<<<<<<<<
@@ -70807,7 +71298,7 @@ static PyObject *__pyx_pf_19dependency_injector_9providers_24isawaitable(CYTHON_
     goto __pyx_L5_except_error;
     __pyx_L5_except_error:;
 
-    /* "dependency_injector/providers.pyx":3699
+    /* "dependency_injector/providers.pyx":3714
  *     Return False for any object in Python 3.4 or below.
  *     """
  *     try:             # <<<<<<<<<<<<<<
@@ -70833,7 +71324,7 @@ static PyObject *__pyx_pf_19dependency_injector_9providers_24isawaitable(CYTHON_
     goto __pyx_L0;
   }
 
-  /* "dependency_injector/providers.pyx":3694
+  /* "dependency_injector/providers.pyx":3709
  * 
  * 
  * def isawaitable(obj):             # <<<<<<<<<<<<<<
@@ -70854,7 +71345,7 @@ static PyObject *__pyx_pf_19dependency_injector_9providers_24isawaitable(CYTHON_
   return __pyx_r;
 }
 
-/* "dependency_injector/providers.pyx":3705
+/* "dependency_injector/providers.pyx":3720
  * 
  * 
  * def iscoroutinefunction(obj):             # <<<<<<<<<<<<<<
@@ -70892,7 +71383,7 @@ static PyObject *__pyx_pf_19dependency_injector_9providers_26iscoroutinefunction
   int __pyx_clineno = 0;
   __Pyx_RefNannySetupContext("iscoroutinefunction", 0);
 
-  /* "dependency_injector/providers.pyx":3710
+  /* "dependency_injector/providers.pyx":3725
  *     Return False for any object in Python 3.4 or below.
  *     """
  *     try:             # <<<<<<<<<<<<<<
@@ -70908,7 +71399,7 @@ static PyObject *__pyx_pf_19dependency_injector_9providers_26iscoroutinefunction
     __Pyx_XGOTREF(__pyx_t_3);
     /*try:*/ {
 
-      /* "dependency_injector/providers.pyx":3711
+      /* "dependency_injector/providers.pyx":3726
  *     """
  *     try:
  *         return inspect.iscoroutinefunction(obj)             # <<<<<<<<<<<<<<
@@ -70916,9 +71407,9 @@ static PyObject *__pyx_pf_19dependency_injector_9providers_26iscoroutinefunction
  *         return False
  */
       __Pyx_XDECREF(__pyx_r);
-      __Pyx_GetModuleGlobalName(__pyx_t_5, __pyx_n_s_inspect); if (unlikely(!__pyx_t_5)) __PYX_ERR(1, 3711, __pyx_L3_error)
+      __Pyx_GetModuleGlobalName(__pyx_t_5, __pyx_n_s_inspect); if (unlikely(!__pyx_t_5)) __PYX_ERR(1, 3726, __pyx_L3_error)
       __Pyx_GOTREF(__pyx_t_5);
-      __pyx_t_6 = __Pyx_PyObject_GetAttrStr(__pyx_t_5, __pyx_n_s_iscoroutinefunction); if (unlikely(!__pyx_t_6)) __PYX_ERR(1, 3711, __pyx_L3_error)
+      __pyx_t_6 = __Pyx_PyObject_GetAttrStr(__pyx_t_5, __pyx_n_s_iscoroutinefunction); if (unlikely(!__pyx_t_6)) __PYX_ERR(1, 3726, __pyx_L3_error)
       __Pyx_GOTREF(__pyx_t_6);
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       __pyx_t_5 = NULL;
@@ -70933,14 +71424,14 @@ static PyObject *__pyx_pf_19dependency_injector_9providers_26iscoroutinefunction
       }
       __pyx_t_4 = (__pyx_t_5) ? __Pyx_PyObject_Call2Args(__pyx_t_6, __pyx_t_5, __pyx_v_obj) : __Pyx_PyObject_CallOneArg(__pyx_t_6, __pyx_v_obj);
       __Pyx_XDECREF(__pyx_t_5); __pyx_t_5 = 0;
-      if (unlikely(!__pyx_t_4)) __PYX_ERR(1, 3711, __pyx_L3_error)
+      if (unlikely(!__pyx_t_4)) __PYX_ERR(1, 3726, __pyx_L3_error)
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       __pyx_t_4 = 0;
       goto __pyx_L7_try_return;
 
-      /* "dependency_injector/providers.pyx":3710
+      /* "dependency_injector/providers.pyx":3725
  *     Return False for any object in Python 3.4 or below.
  *     """
  *     try:             # <<<<<<<<<<<<<<
@@ -70953,7 +71444,7 @@ static PyObject *__pyx_pf_19dependency_injector_9providers_26iscoroutinefunction
     __Pyx_XDECREF(__pyx_t_5); __pyx_t_5 = 0;
     __Pyx_XDECREF(__pyx_t_6); __pyx_t_6 = 0;
 
-    /* "dependency_injector/providers.pyx":3712
+    /* "dependency_injector/providers.pyx":3727
  *     try:
  *         return inspect.iscoroutinefunction(obj)
  *     except AttributeError:             # <<<<<<<<<<<<<<
@@ -70963,12 +71454,12 @@ static PyObject *__pyx_pf_19dependency_injector_9providers_26iscoroutinefunction
     __pyx_t_7 = __Pyx_PyErr_ExceptionMatches(__pyx_builtin_AttributeError);
     if (__pyx_t_7) {
       __Pyx_AddTraceback("dependency_injector.providers.iscoroutinefunction", __pyx_clineno, __pyx_lineno, __pyx_filename);
-      if (__Pyx_GetException(&__pyx_t_4, &__pyx_t_6, &__pyx_t_5) < 0) __PYX_ERR(1, 3712, __pyx_L5_except_error)
+      if (__Pyx_GetException(&__pyx_t_4, &__pyx_t_6, &__pyx_t_5) < 0) __PYX_ERR(1, 3727, __pyx_L5_except_error)
       __Pyx_GOTREF(__pyx_t_4);
       __Pyx_GOTREF(__pyx_t_6);
       __Pyx_GOTREF(__pyx_t_5);
 
-      /* "dependency_injector/providers.pyx":3713
+      /* "dependency_injector/providers.pyx":3728
  *         return inspect.iscoroutinefunction(obj)
  *     except AttributeError:
  *         return False             # <<<<<<<<<<<<<<
@@ -70986,7 +71477,7 @@ static PyObject *__pyx_pf_19dependency_injector_9providers_26iscoroutinefunction
     goto __pyx_L5_except_error;
     __pyx_L5_except_error:;
 
-    /* "dependency_injector/providers.pyx":3710
+    /* "dependency_injector/providers.pyx":3725
  *     Return False for any object in Python 3.4 or below.
  *     """
  *     try:             # <<<<<<<<<<<<<<
@@ -71012,7 +71503,7 @@ static PyObject *__pyx_pf_19dependency_injector_9providers_26iscoroutinefunction
     goto __pyx_L0;
   }
 
-  /* "dependency_injector/providers.pyx":3705
+  /* "dependency_injector/providers.pyx":3720
  * 
  * 
  * def iscoroutinefunction(obj):             # <<<<<<<<<<<<<<
@@ -71033,7 +71524,7 @@ static PyObject *__pyx_pf_19dependency_injector_9providers_26iscoroutinefunction
   return __pyx_r;
 }
 
-/* "dependency_injector/providers.pyx":3716
+/* "dependency_injector/providers.pyx":3731
  * 
  * 
  * def isasyncgenfunction(obj):             # <<<<<<<<<<<<<<
@@ -71071,7 +71562,7 @@ static PyObject *__pyx_pf_19dependency_injector_9providers_28isasyncgenfunction(
   int __pyx_clineno = 0;
   __Pyx_RefNannySetupContext("isasyncgenfunction", 0);
 
-  /* "dependency_injector/providers.pyx":3721
+  /* "dependency_injector/providers.pyx":3736
  *     Return False for any object in Python 3.4 or below.
  *     """
  *     try:             # <<<<<<<<<<<<<<
@@ -71087,7 +71578,7 @@ static PyObject *__pyx_pf_19dependency_injector_9providers_28isasyncgenfunction(
     __Pyx_XGOTREF(__pyx_t_3);
     /*try:*/ {
 
-      /* "dependency_injector/providers.pyx":3722
+      /* "dependency_injector/providers.pyx":3737
  *     """
  *     try:
  *         return inspect.isasyncgenfunction(obj)             # <<<<<<<<<<<<<<
@@ -71095,9 +71586,9 @@ static PyObject *__pyx_pf_19dependency_injector_9providers_28isasyncgenfunction(
  *         return False
  */
       __Pyx_XDECREF(__pyx_r);
-      __Pyx_GetModuleGlobalName(__pyx_t_5, __pyx_n_s_inspect); if (unlikely(!__pyx_t_5)) __PYX_ERR(1, 3722, __pyx_L3_error)
+      __Pyx_GetModuleGlobalName(__pyx_t_5, __pyx_n_s_inspect); if (unlikely(!__pyx_t_5)) __PYX_ERR(1, 3737, __pyx_L3_error)
       __Pyx_GOTREF(__pyx_t_5);
-      __pyx_t_6 = __Pyx_PyObject_GetAttrStr(__pyx_t_5, __pyx_n_s_isasyncgenfunction); if (unlikely(!__pyx_t_6)) __PYX_ERR(1, 3722, __pyx_L3_error)
+      __pyx_t_6 = __Pyx_PyObject_GetAttrStr(__pyx_t_5, __pyx_n_s_isasyncgenfunction); if (unlikely(!__pyx_t_6)) __PYX_ERR(1, 3737, __pyx_L3_error)
       __Pyx_GOTREF(__pyx_t_6);
       __Pyx_DECREF(__pyx_t_5); __pyx_t_5 = 0;
       __pyx_t_5 = NULL;
@@ -71112,14 +71603,14 @@ static PyObject *__pyx_pf_19dependency_injector_9providers_28isasyncgenfunction(
       }
       __pyx_t_4 = (__pyx_t_5) ? __Pyx_PyObject_Call2Args(__pyx_t_6, __pyx_t_5, __pyx_v_obj) : __Pyx_PyObject_CallOneArg(__pyx_t_6, __pyx_v_obj);
       __Pyx_XDECREF(__pyx_t_5); __pyx_t_5 = 0;
-      if (unlikely(!__pyx_t_4)) __PYX_ERR(1, 3722, __pyx_L3_error)
+      if (unlikely(!__pyx_t_4)) __PYX_ERR(1, 3737, __pyx_L3_error)
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       __Pyx_DECREF(__pyx_t_6); __pyx_t_6 = 0;
       __pyx_r = __pyx_t_4;
       __pyx_t_4 = 0;
       goto __pyx_L7_try_return;
 
-      /* "dependency_injector/providers.pyx":3721
+      /* "dependency_injector/providers.pyx":3736
  *     Return False for any object in Python 3.4 or below.
  *     """
  *     try:             # <<<<<<<<<<<<<<
@@ -71132,7 +71623,7 @@ static PyObject *__pyx_pf_19dependency_injector_9providers_28isasyncgenfunction(
     __Pyx_XDECREF(__pyx_t_5); __pyx_t_5 = 0;
     __Pyx_XDECREF(__pyx_t_6); __pyx_t_6 = 0;
 
-    /* "dependency_injector/providers.pyx":3723
+    /* "dependency_injector/providers.pyx":3738
  *     try:
  *         return inspect.isasyncgenfunction(obj)
  *     except AttributeError:             # <<<<<<<<<<<<<<
@@ -71141,12 +71632,12 @@ static PyObject *__pyx_pf_19dependency_injector_9providers_28isasyncgenfunction(
     __pyx_t_7 = __Pyx_PyErr_ExceptionMatches(__pyx_builtin_AttributeError);
     if (__pyx_t_7) {
       __Pyx_AddTraceback("dependency_injector.providers.isasyncgenfunction", __pyx_clineno, __pyx_lineno, __pyx_filename);
-      if (__Pyx_GetException(&__pyx_t_4, &__pyx_t_6, &__pyx_t_5) < 0) __PYX_ERR(1, 3723, __pyx_L5_except_error)
+      if (__Pyx_GetException(&__pyx_t_4, &__pyx_t_6, &__pyx_t_5) < 0) __PYX_ERR(1, 3738, __pyx_L5_except_error)
       __Pyx_GOTREF(__pyx_t_4);
       __Pyx_GOTREF(__pyx_t_6);
       __Pyx_GOTREF(__pyx_t_5);
 
-      /* "dependency_injector/providers.pyx":3724
+      /* "dependency_injector/providers.pyx":3739
  *         return inspect.isasyncgenfunction(obj)
  *     except AttributeError:
  *         return False             # <<<<<<<<<<<<<<
@@ -71162,7 +71653,7 @@ static PyObject *__pyx_pf_19dependency_injector_9providers_28isasyncgenfunction(
     goto __pyx_L5_except_error;
     __pyx_L5_except_error:;
 
-    /* "dependency_injector/providers.pyx":3721
+    /* "dependency_injector/providers.pyx":3736
  *     Return False for any object in Python 3.4 or below.
  *     """
  *     try:             # <<<<<<<<<<<<<<
@@ -71188,7 +71679,7 @@ static PyObject *__pyx_pf_19dependency_injector_9providers_28isasyncgenfunction(
     goto __pyx_L0;
   }
 
-  /* "dependency_injector/providers.pyx":3716
+  /* "dependency_injector/providers.pyx":3731
  * 
  * 
  * def isasyncgenfunction(obj):             # <<<<<<<<<<<<<<
@@ -78007,18 +78498,18 @@ static PyObject *__pyx_pf_19dependency_injector_9providers_61__pyx_unpickle_Conf
   /* "(tree fragment)":4
  *     cdef object __pyx_PickleError
  *     cdef object __pyx_result
- *     if __pyx_checksum != 0x66bc620:             # <<<<<<<<<<<<<<
+ *     if __pyx_checksum != 0x101ecef:             # <<<<<<<<<<<<<<
  *         from pickle import PickleError as __pyx_PickleError
- *         raise __pyx_PickleError("Incompatible checksums (%s vs 0x66bc620 = (__async_mode, __cache, __children, __last_overriding, __name, __overridden, __root_ref))" % __pyx_checksum)
+ *         raise __pyx_PickleError("Incompatible checksums (%s vs 0x101ecef = (__async_mode, __cache, __children, __last_overriding, __name, __overridden, __required, __root_ref))" % __pyx_checksum)
  */
-  __pyx_t_1 = ((__pyx_v___pyx_checksum != 0x66bc620) != 0);
+  __pyx_t_1 = ((__pyx_v___pyx_checksum != 0x101ecef) != 0);
   if (__pyx_t_1) {
 
     /* "(tree fragment)":5
  *     cdef object __pyx_result
- *     if __pyx_checksum != 0x66bc620:
+ *     if __pyx_checksum != 0x101ecef:
  *         from pickle import PickleError as __pyx_PickleError             # <<<<<<<<<<<<<<
- *         raise __pyx_PickleError("Incompatible checksums (%s vs 0x66bc620 = (__async_mode, __cache, __children, __last_overriding, __name, __overridden, __root_ref))" % __pyx_checksum)
+ *         raise __pyx_PickleError("Incompatible checksums (%s vs 0x101ecef = (__async_mode, __cache, __children, __last_overriding, __name, __overridden, __required, __root_ref))" % __pyx_checksum)
  *     __pyx_result = ConfigurationOption.__new__(__pyx_type)
  */
     __pyx_t_2 = PyList_New(1); if (unlikely(!__pyx_t_2)) __PYX_ERR(2, 5, __pyx_L1_error)
@@ -78037,15 +78528,15 @@ static PyObject *__pyx_pf_19dependency_injector_9providers_61__pyx_unpickle_Conf
     __Pyx_DECREF(__pyx_t_3); __pyx_t_3 = 0;
 
     /* "(tree fragment)":6
- *     if __pyx_checksum != 0x66bc620:
+ *     if __pyx_checksum != 0x101ecef:
  *         from pickle import PickleError as __pyx_PickleError
- *         raise __pyx_PickleError("Incompatible checksums (%s vs 0x66bc620 = (__async_mode, __cache, __children, __last_overriding, __name, __overridden, __root_ref))" % __pyx_checksum)             # <<<<<<<<<<<<<<
+ *         raise __pyx_PickleError("Incompatible checksums (%s vs 0x101ecef = (__async_mode, __cache, __children, __last_overriding, __name, __overridden, __required, __root_ref))" % __pyx_checksum)             # <<<<<<<<<<<<<<
  *     __pyx_result = ConfigurationOption.__new__(__pyx_type)
  *     if __pyx_state is not None:
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     __pyx_t_2 = __Pyx_PyInt_From_long(__pyx_v___pyx_checksum); if (unlikely(!__pyx_t_2)) __PYX_ERR(2, 6, __pyx_L1_error)
     __Pyx_GOTREF(__pyx_t_2);
-    __pyx_t_4 = __Pyx_PyString_Format(__pyx_kp_s_Incompatible_checksums_s_vs_0x66, __pyx_t_2); if (unlikely(!__pyx_t_4)) __PYX_ERR(2, 6, __pyx_L1_error)
+    __pyx_t_4 = __Pyx_PyString_Format(__pyx_kp_s_Incompatible_checksums_s_vs_0x10, __pyx_t_2); if (unlikely(!__pyx_t_4)) __PYX_ERR(2, 6, __pyx_L1_error)
     __Pyx_GOTREF(__pyx_t_4);
     __Pyx_DECREF(__pyx_t_2); __pyx_t_2 = 0;
     __Pyx_INCREF(__pyx_v___pyx_PickleError);
@@ -78072,15 +78563,15 @@ static PyObject *__pyx_pf_19dependency_injector_9providers_61__pyx_unpickle_Conf
     /* "(tree fragment)":4
  *     cdef object __pyx_PickleError
  *     cdef object __pyx_result
- *     if __pyx_checksum != 0x66bc620:             # <<<<<<<<<<<<<<
+ *     if __pyx_checksum != 0x101ecef:             # <<<<<<<<<<<<<<
  *         from pickle import PickleError as __pyx_PickleError
- *         raise __pyx_PickleError("Incompatible checksums (%s vs 0x66bc620 = (__async_mode, __cache, __children, __last_overriding, __name, __overridden, __root_ref))" % __pyx_checksum)
+ *         raise __pyx_PickleError("Incompatible checksums (%s vs 0x101ecef = (__async_mode, __cache, __children, __last_overriding, __name, __overridden, __required, __root_ref))" % __pyx_checksum)
  */
   }
 
   /* "(tree fragment)":7
  *         from pickle import PickleError as __pyx_PickleError
- *         raise __pyx_PickleError("Incompatible checksums (%s vs 0x66bc620 = (__async_mode, __cache, __children, __last_overriding, __name, __overridden, __root_ref))" % __pyx_checksum)
+ *         raise __pyx_PickleError("Incompatible checksums (%s vs 0x101ecef = (__async_mode, __cache, __children, __last_overriding, __name, __overridden, __required, __root_ref))" % __pyx_checksum)
  *     __pyx_result = ConfigurationOption.__new__(__pyx_type)             # <<<<<<<<<<<<<<
  *     if __pyx_state is not None:
  *         __pyx_unpickle_ConfigurationOption__set_state(<ConfigurationOption> __pyx_result, __pyx_state)
@@ -78106,7 +78597,7 @@ static PyObject *__pyx_pf_19dependency_injector_9providers_61__pyx_unpickle_Conf
   __pyx_t_3 = 0;
 
   /* "(tree fragment)":8
- *         raise __pyx_PickleError("Incompatible checksums (%s vs 0x66bc620 = (__async_mode, __cache, __children, __last_overriding, __name, __overridden, __root_ref))" % __pyx_checksum)
+ *         raise __pyx_PickleError("Incompatible checksums (%s vs 0x101ecef = (__async_mode, __cache, __children, __last_overriding, __name, __overridden, __required, __root_ref))" % __pyx_checksum)
  *     __pyx_result = ConfigurationOption.__new__(__pyx_type)
  *     if __pyx_state is not None:             # <<<<<<<<<<<<<<
  *         __pyx_unpickle_ConfigurationOption__set_state(<ConfigurationOption> __pyx_result, __pyx_state)
@@ -78129,7 +78620,7 @@ static PyObject *__pyx_pf_19dependency_injector_9providers_61__pyx_unpickle_Conf
     __Pyx_DECREF(__pyx_t_3); __pyx_t_3 = 0;
 
     /* "(tree fragment)":8
- *         raise __pyx_PickleError("Incompatible checksums (%s vs 0x66bc620 = (__async_mode, __cache, __children, __last_overriding, __name, __overridden, __root_ref))" % __pyx_checksum)
+ *         raise __pyx_PickleError("Incompatible checksums (%s vs 0x101ecef = (__async_mode, __cache, __children, __last_overriding, __name, __overridden, __required, __root_ref))" % __pyx_checksum)
  *     __pyx_result = ConfigurationOption.__new__(__pyx_type)
  *     if __pyx_state is not None:             # <<<<<<<<<<<<<<
  *         __pyx_unpickle_ConfigurationOption__set_state(<ConfigurationOption> __pyx_result, __pyx_state)
@@ -78142,7 +78633,7 @@ static PyObject *__pyx_pf_19dependency_injector_9providers_61__pyx_unpickle_Conf
  *         __pyx_unpickle_ConfigurationOption__set_state(<ConfigurationOption> __pyx_result, __pyx_state)
  *     return __pyx_result             # <<<<<<<<<<<<<<
  * cdef __pyx_unpickle_ConfigurationOption__set_state(ConfigurationOption __pyx_result, tuple __pyx_state):
- *     __pyx_result.__async_mode = __pyx_state[0]; __pyx_result.__cache = __pyx_state[1]; __pyx_result.__children = __pyx_state[2]; __pyx_result.__last_overriding = __pyx_state[3]; __pyx_result.__name = __pyx_state[4]; __pyx_result.__overridden = __pyx_state[5]; __pyx_result.__root_ref = __pyx_state[6]
+ *     __pyx_result.__async_mode = __pyx_state[0]; __pyx_result.__cache = __pyx_state[1]; __pyx_result.__children = __pyx_state[2]; __pyx_result.__last_overriding = __pyx_state[3]; __pyx_result.__name = __pyx_state[4]; __pyx_result.__overridden = __pyx_state[5]; __pyx_result.__required = __pyx_state[6]; __pyx_result.__root_ref = __pyx_state[7]
  */
   __Pyx_XDECREF(__pyx_r);
   __Pyx_INCREF(__pyx_v___pyx_result);
@@ -78175,8 +78666,8 @@ static PyObject *__pyx_pf_19dependency_injector_9providers_61__pyx_unpickle_Conf
  *         __pyx_unpickle_ConfigurationOption__set_state(<ConfigurationOption> __pyx_result, __pyx_state)
  *     return __pyx_result
  * cdef __pyx_unpickle_ConfigurationOption__set_state(ConfigurationOption __pyx_result, tuple __pyx_state):             # <<<<<<<<<<<<<<
- *     __pyx_result.__async_mode = __pyx_state[0]; __pyx_result.__cache = __pyx_state[1]; __pyx_result.__children = __pyx_state[2]; __pyx_result.__last_overriding = __pyx_state[3]; __pyx_result.__name = __pyx_state[4]; __pyx_result.__overridden = __pyx_state[5]; __pyx_result.__root_ref = __pyx_state[6]
- *     if len(__pyx_state) > 7 and hasattr(__pyx_result, '__dict__'):
+ *     __pyx_result.__async_mode = __pyx_state[0]; __pyx_result.__cache = __pyx_state[1]; __pyx_result.__children = __pyx_state[2]; __pyx_result.__last_overriding = __pyx_state[3]; __pyx_result.__name = __pyx_state[4]; __pyx_result.__overridden = __pyx_state[5]; __pyx_result.__required = __pyx_state[6]; __pyx_result.__root_ref = __pyx_state[7]
+ *     if len(__pyx_state) > 8 and hasattr(__pyx_result, '__dict__'):
  */
 
 static PyObject *__pyx_f_19dependency_injector_9providers___pyx_unpickle_ConfigurationOption__set_state(struct __pyx_obj_19dependency_injector_9providers_ConfigurationOption *__pyx_v___pyx_result, PyObject *__pyx_v___pyx_state) {
@@ -78199,9 +78690,9 @@ static PyObject *__pyx_f_19dependency_injector_9providers___pyx_unpickle_Configu
   /* "(tree fragment)":12
  *     return __pyx_result
  * cdef __pyx_unpickle_ConfigurationOption__set_state(ConfigurationOption __pyx_result, tuple __pyx_state):
- *     __pyx_result.__async_mode = __pyx_state[0]; __pyx_result.__cache = __pyx_state[1]; __pyx_result.__children = __pyx_state[2]; __pyx_result.__last_overriding = __pyx_state[3]; __pyx_result.__name = __pyx_state[4]; __pyx_result.__overridden = __pyx_state[5]; __pyx_result.__root_ref = __pyx_state[6]             # <<<<<<<<<<<<<<
- *     if len(__pyx_state) > 7 and hasattr(__pyx_result, '__dict__'):
- *         __pyx_result.__dict__.update(__pyx_state[7])
+ *     __pyx_result.__async_mode = __pyx_state[0]; __pyx_result.__cache = __pyx_state[1]; __pyx_result.__children = __pyx_state[2]; __pyx_result.__last_overriding = __pyx_state[3]; __pyx_result.__name = __pyx_state[4]; __pyx_result.__overridden = __pyx_state[5]; __pyx_result.__required = __pyx_state[6]; __pyx_result.__root_ref = __pyx_state[7]             # <<<<<<<<<<<<<<
+ *     if len(__pyx_state) > 8 and hasattr(__pyx_result, '__dict__'):
+ *         __pyx_result.__dict__.update(__pyx_state[8])
  */
   if (unlikely(__pyx_v___pyx_state == Py_None)) {
     PyErr_SetString(PyExc_TypeError, "'NoneType' object is not subscriptable");
@@ -78277,6 +78768,15 @@ static PyObject *__pyx_f_19dependency_injector_9providers___pyx_unpickle_Configu
   }
   __pyx_t_1 = __Pyx_GetItemInt_Tuple(__pyx_v___pyx_state, 6, long, 1, __Pyx_PyInt_From_long, 0, 0, 1); if (unlikely(!__pyx_t_1)) __PYX_ERR(2, 12, __pyx_L1_error)
   __Pyx_GOTREF(__pyx_t_1);
+  __pyx_t_3 = __Pyx_PyObject_IsTrue(__pyx_t_1); if (unlikely((__pyx_t_3 == (int)-1) && PyErr_Occurred())) __PYX_ERR(2, 12, __pyx_L1_error)
+  __Pyx_DECREF(__pyx_t_1); __pyx_t_1 = 0;
+  __pyx_v___pyx_result->__pyx___required = __pyx_t_3;
+  if (unlikely(__pyx_v___pyx_state == Py_None)) {
+    PyErr_SetString(PyExc_TypeError, "'NoneType' object is not subscriptable");
+    __PYX_ERR(2, 12, __pyx_L1_error)
+  }
+  __pyx_t_1 = __Pyx_GetItemInt_Tuple(__pyx_v___pyx_state, 7, long, 1, __Pyx_PyInt_From_long, 0, 0, 1); if (unlikely(!__pyx_t_1)) __PYX_ERR(2, 12, __pyx_L1_error)
+  __Pyx_GOTREF(__pyx_t_1);
   __Pyx_GIVEREF(__pyx_t_1);
   __Pyx_GOTREF(__pyx_v___pyx_result->__pyx___root_ref);
   __Pyx_DECREF(__pyx_v___pyx_result->__pyx___root_ref);
@@ -78285,16 +78785,16 @@ static PyObject *__pyx_f_19dependency_injector_9providers___pyx_unpickle_Configu
 
   /* "(tree fragment)":13
  * cdef __pyx_unpickle_ConfigurationOption__set_state(ConfigurationOption __pyx_result, tuple __pyx_state):
- *     __pyx_result.__async_mode = __pyx_state[0]; __pyx_result.__cache = __pyx_state[1]; __pyx_result.__children = __pyx_state[2]; __pyx_result.__last_overriding = __pyx_state[3]; __pyx_result.__name = __pyx_state[4]; __pyx_result.__overridden = __pyx_state[5]; __pyx_result.__root_ref = __pyx_state[6]
- *     if len(__pyx_state) > 7 and hasattr(__pyx_result, '__dict__'):             # <<<<<<<<<<<<<<
- *         __pyx_result.__dict__.update(__pyx_state[7])
+ *     __pyx_result.__async_mode = __pyx_state[0]; __pyx_result.__cache = __pyx_state[1]; __pyx_result.__children = __pyx_state[2]; __pyx_result.__last_overriding = __pyx_state[3]; __pyx_result.__name = __pyx_state[4]; __pyx_result.__overridden = __pyx_state[5]; __pyx_result.__required = __pyx_state[6]; __pyx_result.__root_ref = __pyx_state[7]
+ *     if len(__pyx_state) > 8 and hasattr(__pyx_result, '__dict__'):             # <<<<<<<<<<<<<<
+ *         __pyx_result.__dict__.update(__pyx_state[8])
  */
   if (unlikely(__pyx_v___pyx_state == Py_None)) {
     PyErr_SetString(PyExc_TypeError, "object of type 'NoneType' has no len()");
     __PYX_ERR(2, 13, __pyx_L1_error)
   }
   __pyx_t_4 = PyTuple_GET_SIZE(__pyx_v___pyx_state); if (unlikely(__pyx_t_4 == ((Py_ssize_t)-1))) __PYX_ERR(2, 13, __pyx_L1_error)
-  __pyx_t_5 = ((__pyx_t_4 > 7) != 0);
+  __pyx_t_5 = ((__pyx_t_4 > 8) != 0);
   if (__pyx_t_5) {
   } else {
     __pyx_t_3 = __pyx_t_5;
@@ -78307,9 +78807,9 @@ static PyObject *__pyx_f_19dependency_injector_9providers___pyx_unpickle_Configu
   if (__pyx_t_3) {
 
     /* "(tree fragment)":14
- *     __pyx_result.__async_mode = __pyx_state[0]; __pyx_result.__cache = __pyx_state[1]; __pyx_result.__children = __pyx_state[2]; __pyx_result.__last_overriding = __pyx_state[3]; __pyx_result.__name = __pyx_state[4]; __pyx_result.__overridden = __pyx_state[5]; __pyx_result.__root_ref = __pyx_state[6]
- *     if len(__pyx_state) > 7 and hasattr(__pyx_result, '__dict__'):
- *         __pyx_result.__dict__.update(__pyx_state[7])             # <<<<<<<<<<<<<<
+ *     __pyx_result.__async_mode = __pyx_state[0]; __pyx_result.__cache = __pyx_state[1]; __pyx_result.__children = __pyx_state[2]; __pyx_result.__last_overriding = __pyx_state[3]; __pyx_result.__name = __pyx_state[4]; __pyx_result.__overridden = __pyx_state[5]; __pyx_result.__required = __pyx_state[6]; __pyx_result.__root_ref = __pyx_state[7]
+ *     if len(__pyx_state) > 8 and hasattr(__pyx_result, '__dict__'):
+ *         __pyx_result.__dict__.update(__pyx_state[8])             # <<<<<<<<<<<<<<
  */
     __pyx_t_7 = __Pyx_PyObject_GetAttrStr(((PyObject *)__pyx_v___pyx_result), __pyx_n_s_dict); if (unlikely(!__pyx_t_7)) __PYX_ERR(2, 14, __pyx_L1_error)
     __Pyx_GOTREF(__pyx_t_7);
@@ -78320,7 +78820,7 @@ static PyObject *__pyx_f_19dependency_injector_9providers___pyx_unpickle_Configu
       PyErr_SetString(PyExc_TypeError, "'NoneType' object is not subscriptable");
       __PYX_ERR(2, 14, __pyx_L1_error)
     }
-    __pyx_t_7 = __Pyx_GetItemInt_Tuple(__pyx_v___pyx_state, 7, long, 1, __Pyx_PyInt_From_long, 0, 0, 1); if (unlikely(!__pyx_t_7)) __PYX_ERR(2, 14, __pyx_L1_error)
+    __pyx_t_7 = __Pyx_GetItemInt_Tuple(__pyx_v___pyx_state, 8, long, 1, __Pyx_PyInt_From_long, 0, 0, 1); if (unlikely(!__pyx_t_7)) __PYX_ERR(2, 14, __pyx_L1_error)
     __Pyx_GOTREF(__pyx_t_7);
     __pyx_t_9 = NULL;
     if (CYTHON_UNPACK_METHODS && likely(PyMethod_Check(__pyx_t_8))) {
@@ -78342,9 +78842,9 @@ static PyObject *__pyx_f_19dependency_injector_9providers___pyx_unpickle_Configu
 
     /* "(tree fragment)":13
  * cdef __pyx_unpickle_ConfigurationOption__set_state(ConfigurationOption __pyx_result, tuple __pyx_state):
- *     __pyx_result.__async_mode = __pyx_state[0]; __pyx_result.__cache = __pyx_state[1]; __pyx_result.__children = __pyx_state[2]; __pyx_result.__last_overriding = __pyx_state[3]; __pyx_result.__name = __pyx_state[4]; __pyx_result.__overridden = __pyx_state[5]; __pyx_result.__root_ref = __pyx_state[6]
- *     if len(__pyx_state) > 7 and hasattr(__pyx_result, '__dict__'):             # <<<<<<<<<<<<<<
- *         __pyx_result.__dict__.update(__pyx_state[7])
+ *     __pyx_result.__async_mode = __pyx_state[0]; __pyx_result.__cache = __pyx_state[1]; __pyx_result.__children = __pyx_state[2]; __pyx_result.__last_overriding = __pyx_state[3]; __pyx_result.__name = __pyx_state[4]; __pyx_result.__overridden = __pyx_state[5]; __pyx_result.__required = __pyx_state[6]; __pyx_result.__root_ref = __pyx_state[7]
+ *     if len(__pyx_state) > 8 and hasattr(__pyx_result, '__dict__'):             # <<<<<<<<<<<<<<
+ *         __pyx_result.__dict__.update(__pyx_state[8])
  */
   }
 
@@ -78352,8 +78852,8 @@ static PyObject *__pyx_f_19dependency_injector_9providers___pyx_unpickle_Configu
  *         __pyx_unpickle_ConfigurationOption__set_state(<ConfigurationOption> __pyx_result, __pyx_state)
  *     return __pyx_result
  * cdef __pyx_unpickle_ConfigurationOption__set_state(ConfigurationOption __pyx_result, tuple __pyx_state):             # <<<<<<<<<<<<<<
- *     __pyx_result.__async_mode = __pyx_state[0]; __pyx_result.__cache = __pyx_state[1]; __pyx_result.__children = __pyx_state[2]; __pyx_result.__last_overriding = __pyx_state[3]; __pyx_result.__name = __pyx_state[4]; __pyx_result.__overridden = __pyx_state[5]; __pyx_result.__root_ref = __pyx_state[6]
- *     if len(__pyx_state) > 7 and hasattr(__pyx_result, '__dict__'):
+ *     __pyx_result.__async_mode = __pyx_state[0]; __pyx_result.__cache = __pyx_state[1]; __pyx_result.__children = __pyx_state[2]; __pyx_result.__last_overriding = __pyx_state[3]; __pyx_result.__name = __pyx_state[4]; __pyx_result.__overridden = __pyx_state[5]; __pyx_result.__required = __pyx_state[6]; __pyx_result.__root_ref = __pyx_state[7]
+ *     if len(__pyx_state) > 8 and hasattr(__pyx_result, '__dict__'):
  */
 
   /* function exit code */
@@ -78946,18 +79446,18 @@ static PyObject *__pyx_pf_19dependency_injector_9providers_65__pyx_unpickle_Conf
   /* "(tree fragment)":4
  *     cdef object __pyx_PickleError
  *     cdef object __pyx_result
- *     if __pyx_checksum != 0x3460d23:             # <<<<<<<<<<<<<<
+ *     if __pyx_checksum != 0x42fe861:             # <<<<<<<<<<<<<<
  *         from pickle import PickleError as __pyx_PickleError
- *         raise __pyx_PickleError("Incompatible checksums (%s vs 0x3460d23 = (__async_mode, __children, __last_overriding, __name, __overridden, __provides))" % __pyx_checksum)
+ *         raise __pyx_PickleError("Incompatible checksums (%s vs 0x42fe861 = (__async_mode, __children, __last_overriding, __name, __overridden, __provides, __strict))" % __pyx_checksum)
  */
-  __pyx_t_1 = ((__pyx_v___pyx_checksum != 0x3460d23) != 0);
+  __pyx_t_1 = ((__pyx_v___pyx_checksum != 0x42fe861) != 0);
   if (__pyx_t_1) {
 
     /* "(tree fragment)":5
  *     cdef object __pyx_result
- *     if __pyx_checksum != 0x3460d23:
+ *     if __pyx_checksum != 0x42fe861:
  *         from pickle import PickleError as __pyx_PickleError             # <<<<<<<<<<<<<<
- *         raise __pyx_PickleError("Incompatible checksums (%s vs 0x3460d23 = (__async_mode, __children, __last_overriding, __name, __overridden, __provides))" % __pyx_checksum)
+ *         raise __pyx_PickleError("Incompatible checksums (%s vs 0x42fe861 = (__async_mode, __children, __last_overriding, __name, __overridden, __provides, __strict))" % __pyx_checksum)
  *     __pyx_result = Configuration.__new__(__pyx_type)
  */
     __pyx_t_2 = PyList_New(1); if (unlikely(!__pyx_t_2)) __PYX_ERR(2, 5, __pyx_L1_error)
@@ -78976,15 +79476,15 @@ static PyObject *__pyx_pf_19dependency_injector_9providers_65__pyx_unpickle_Conf
     __Pyx_DECREF(__pyx_t_3); __pyx_t_3 = 0;
 
     /* "(tree fragment)":6
- *     if __pyx_checksum != 0x3460d23:
+ *     if __pyx_checksum != 0x42fe861:
  *         from pickle import PickleError as __pyx_PickleError
- *         raise __pyx_PickleError("Incompatible checksums (%s vs 0x3460d23 = (__async_mode, __children, __last_overriding, __name, __overridden, __provides))" % __pyx_checksum)             # <<<<<<<<<<<<<<
+ *         raise __pyx_PickleError("Incompatible checksums (%s vs 0x42fe861 = (__async_mode, __children, __last_overriding, __name, __overridden, __provides, __strict))" % __pyx_checksum)             # <<<<<<<<<<<<<<
  *     __pyx_result = Configuration.__new__(__pyx_type)
  *     if __pyx_state is not None:
  */
     __pyx_t_2 = __Pyx_PyInt_From_long(__pyx_v___pyx_checksum); if (unlikely(!__pyx_t_2)) __PYX_ERR(2, 6, __pyx_L1_error)
     __Pyx_GOTREF(__pyx_t_2);
-    __pyx_t_4 = __Pyx_PyString_Format(__pyx_kp_s_Incompatible_checksums_s_vs_0x34, __pyx_t_2); if (unlikely(!__pyx_t_4)) __PYX_ERR(2, 6, __pyx_L1_error)
+    __pyx_t_4 = __Pyx_PyString_Format(__pyx_kp_s_Incompatible_checksums_s_vs_0x42, __pyx_t_2); if (unlikely(!__pyx_t_4)) __PYX_ERR(2, 6, __pyx_L1_error)
     __Pyx_GOTREF(__pyx_t_4);
     __Pyx_DECREF(__pyx_t_2); __pyx_t_2 = 0;
     __Pyx_INCREF(__pyx_v___pyx_PickleError);
@@ -79011,15 +79511,15 @@ static PyObject *__pyx_pf_19dependency_injector_9providers_65__pyx_unpickle_Conf
     /* "(tree fragment)":4
  *     cdef object __pyx_PickleError
  *     cdef object __pyx_result
- *     if __pyx_checksum != 0x3460d23:             # <<<<<<<<<<<<<<
+ *     if __pyx_checksum != 0x42fe861:             # <<<<<<<<<<<<<<
  *         from pickle import PickleError as __pyx_PickleError
- *         raise __pyx_PickleError("Incompatible checksums (%s vs 0x3460d23 = (__async_mode, __children, __last_overriding, __name, __overridden, __provides))" % __pyx_checksum)
+ *         raise __pyx_PickleError("Incompatible checksums (%s vs 0x42fe861 = (__async_mode, __children, __last_overriding, __name, __overridden, __provides, __strict))" % __pyx_checksum)
  */
   }
 
   /* "(tree fragment)":7
  *         from pickle import PickleError as __pyx_PickleError
- *         raise __pyx_PickleError("Incompatible checksums (%s vs 0x3460d23 = (__async_mode, __children, __last_overriding, __name, __overridden, __provides))" % __pyx_checksum)
+ *         raise __pyx_PickleError("Incompatible checksums (%s vs 0x42fe861 = (__async_mode, __children, __last_overriding, __name, __overridden, __provides, __strict))" % __pyx_checksum)
  *     __pyx_result = Configuration.__new__(__pyx_type)             # <<<<<<<<<<<<<<
  *     if __pyx_state is not None:
  *         __pyx_unpickle_Configuration__set_state(<Configuration> __pyx_result, __pyx_state)
@@ -79045,7 +79545,7 @@ static PyObject *__pyx_pf_19dependency_injector_9providers_65__pyx_unpickle_Conf
   __pyx_t_3 = 0;
 
   /* "(tree fragment)":8
- *         raise __pyx_PickleError("Incompatible checksums (%s vs 0x3460d23 = (__async_mode, __children, __last_overriding, __name, __overridden, __provides))" % __pyx_checksum)
+ *         raise __pyx_PickleError("Incompatible checksums (%s vs 0x42fe861 = (__async_mode, __children, __last_overriding, __name, __overridden, __provides, __strict))" % __pyx_checksum)
  *     __pyx_result = Configuration.__new__(__pyx_type)
  *     if __pyx_state is not None:             # <<<<<<<<<<<<<<
  *         __pyx_unpickle_Configuration__set_state(<Configuration> __pyx_result, __pyx_state)
@@ -79068,7 +79568,7 @@ static PyObject *__pyx_pf_19dependency_injector_9providers_65__pyx_unpickle_Conf
     __Pyx_DECREF(__pyx_t_3); __pyx_t_3 = 0;
 
     /* "(tree fragment)":8
- *         raise __pyx_PickleError("Incompatible checksums (%s vs 0x3460d23 = (__async_mode, __children, __last_overriding, __name, __overridden, __provides))" % __pyx_checksum)
+ *         raise __pyx_PickleError("Incompatible checksums (%s vs 0x42fe861 = (__async_mode, __children, __last_overriding, __name, __overridden, __provides, __strict))" % __pyx_checksum)
  *     __pyx_result = Configuration.__new__(__pyx_type)
  *     if __pyx_state is not None:             # <<<<<<<<<<<<<<
  *         __pyx_unpickle_Configuration__set_state(<Configuration> __pyx_result, __pyx_state)
@@ -79081,7 +79581,7 @@ static PyObject *__pyx_pf_19dependency_injector_9providers_65__pyx_unpickle_Conf
  *         __pyx_unpickle_Configuration__set_state(<Configuration> __pyx_result, __pyx_state)
  *     return __pyx_result             # <<<<<<<<<<<<<<
  * cdef __pyx_unpickle_Configuration__set_state(Configuration __pyx_result, tuple __pyx_state):
- *     __pyx_result.__async_mode = __pyx_state[0]; __pyx_result.__children = __pyx_state[1]; __pyx_result.__last_overriding = __pyx_state[2]; __pyx_result.__name = __pyx_state[3]; __pyx_result.__overridden = __pyx_state[4]; __pyx_result.__provides = __pyx_state[5]
+ *     __pyx_result.__async_mode = __pyx_state[0]; __pyx_result.__children = __pyx_state[1]; __pyx_result.__last_overriding = __pyx_state[2]; __pyx_result.__name = __pyx_state[3]; __pyx_result.__overridden = __pyx_state[4]; __pyx_result.__provides = __pyx_state[5]; __pyx_result.__strict = __pyx_state[6]
  */
   __Pyx_XDECREF(__pyx_r);
   __Pyx_INCREF(__pyx_v___pyx_result);
@@ -79114,8 +79614,8 @@ static PyObject *__pyx_pf_19dependency_injector_9providers_65__pyx_unpickle_Conf
  *         __pyx_unpickle_Configuration__set_state(<Configuration> __pyx_result, __pyx_state)
  *     return __pyx_result
  * cdef __pyx_unpickle_Configuration__set_state(Configuration __pyx_result, tuple __pyx_state):             # <<<<<<<<<<<<<<
- *     __pyx_result.__async_mode = __pyx_state[0]; __pyx_result.__children = __pyx_state[1]; __pyx_result.__last_overriding = __pyx_state[2]; __pyx_result.__name = __pyx_state[3]; __pyx_result.__overridden = __pyx_state[4]; __pyx_result.__provides = __pyx_state[5]
- *     if len(__pyx_state) > 6 and hasattr(__pyx_result, '__dict__'):
+ *     __pyx_result.__async_mode = __pyx_state[0]; __pyx_result.__children = __pyx_state[1]; __pyx_result.__last_overriding = __pyx_state[2]; __pyx_result.__name = __pyx_state[3]; __pyx_result.__overridden = __pyx_state[4]; __pyx_result.__provides = __pyx_state[5]; __pyx_result.__strict = __pyx_state[6]
+ *     if len(__pyx_state) > 7 and hasattr(__pyx_result, '__dict__'):
  */
 
 static PyObject *__pyx_f_19dependency_injector_9providers___pyx_unpickle_Configuration__set_state(struct __pyx_obj_19dependency_injector_9providers_Configuration *__pyx_v___pyx_result, PyObject *__pyx_v___pyx_state) {
@@ -79138,9 +79638,9 @@ static PyObject *__pyx_f_19dependency_injector_9providers___pyx_unpickle_Configu
   /* "(tree fragment)":12
  *     return __pyx_result
  * cdef __pyx_unpickle_Configuration__set_state(Configuration __pyx_result, tuple __pyx_state):
- *     __pyx_result.__async_mode = __pyx_state[0]; __pyx_result.__children = __pyx_state[1]; __pyx_result.__last_overriding = __pyx_state[2]; __pyx_result.__name = __pyx_state[3]; __pyx_result.__overridden = __pyx_state[4]; __pyx_result.__provides = __pyx_state[5]             # <<<<<<<<<<<<<<
- *     if len(__pyx_state) > 6 and hasattr(__pyx_result, '__dict__'):
- *         __pyx_result.__dict__.update(__pyx_state[6])
+ *     __pyx_result.__async_mode = __pyx_state[0]; __pyx_result.__children = __pyx_state[1]; __pyx_result.__last_overriding = __pyx_state[2]; __pyx_result.__name = __pyx_state[3]; __pyx_result.__overridden = __pyx_state[4]; __pyx_result.__provides = __pyx_state[5]; __pyx_result.__strict = __pyx_state[6]             # <<<<<<<<<<<<<<
+ *     if len(__pyx_state) > 7 and hasattr(__pyx_result, '__dict__'):
+ *         __pyx_result.__dict__.update(__pyx_state[7])
  */
   if (unlikely(__pyx_v___pyx_state == Py_None)) {
     PyErr_SetString(PyExc_TypeError, "'NoneType' object is not subscriptable");
@@ -79210,19 +79710,28 @@ static PyObject *__pyx_f_19dependency_injector_9providers___pyx_unpickle_Configu
   __Pyx_DECREF(__pyx_v___pyx_result->__pyx_base.__pyx___provides);
   __pyx_v___pyx_result->__pyx_base.__pyx___provides = __pyx_t_1;
   __pyx_t_1 = 0;
+  if (unlikely(__pyx_v___pyx_state == Py_None)) {
+    PyErr_SetString(PyExc_TypeError, "'NoneType' object is not subscriptable");
+    __PYX_ERR(2, 12, __pyx_L1_error)
+  }
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@@ -91251,7 +91760,7 @@ static CYTHON_INLINE PyObject *__pyx_f_19dependency_injector_9providers___separa
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@@ -91259,7 +91768,7 @@ static CYTHON_INLINE PyObject *__pyx_f_19dependency_injector_9providers___separa
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-      /* "dependency_injector/providers.pxd":325
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-      /* "dependency_injector/providers.pxd":326
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@@ -91296,7 +91805,7 @@ static CYTHON_INLINE PyObject *__pyx_f_19dependency_injector_9providers___separa
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-      /* "dependency_injector/providers.pxd":324
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@@ -91305,14 +91814,14 @@ static CYTHON_INLINE PyObject *__pyx_f_19dependency_injector_9providers___separa
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-    /* "dependency_injector/providers.pxd":328
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@@ -91326,24 +91835,24 @@ static CYTHON_INLINE PyObject *__pyx_f_19dependency_injector_9providers___separa
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@@ -91351,30 +91860,30 @@ static CYTHON_INLINE PyObject *__pyx_f_19dependency_injector_9providers___separa
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@@ -91406,7 +91915,7 @@ static CYTHON_INLINE PyObject *__pyx_f_19dependency_injector_9providers___separa
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-  /* "dependency_injector/providers.pxd":335
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@@ -91414,7 +91923,7 @@ static CYTHON_INLINE PyObject *__pyx_f_19dependency_injector_9providers___separa
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@@ -91426,7 +91935,7 @@ static CYTHON_INLINE PyObject *__pyx_f_19dependency_injector_9providers___separa
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-  __pyx_t_1 = PyList_New(0); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 346, __pyx_L1_error)
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-  /* "dependency_injector/providers.pxd":347
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-  __pyx_t_1 = PyList_New(0); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 347, __pyx_L1_error)
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-  /* "dependency_injector/providers.pxd":350
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-    /* "dependency_injector/providers.pxd":351
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-    /* "dependency_injector/providers.pxd":350
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@@ -91539,7 +92048,7 @@ static CYTHON_INLINE PyObject *__pyx_f_19dependency_injector_9providers___provid
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-  /* "dependency_injector/providers.pxd":353
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-    /* "dependency_injector/providers.pxd":354
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-    /* "dependency_injector/providers.pxd":355
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-    /* "dependency_injector/providers.pxd":356
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-    /* "dependency_injector/providers.pxd":358
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  *         if __isawaitable(value):             # <<<<<<<<<<<<<<
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-      /* "dependency_injector/providers.pxd":359
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-        /* "dependency_injector/providers.pxd":390
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-        /* "dependency_injector/providers.pxd":561
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@@ -94774,12 +95283,12 @@ static CYTHON_INLINE PyObject *__pyx_f_19dependency_injector_9providers___factor
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-        /* "dependency_injector/providers.pxd":562
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-        /* "dependency_injector/providers.pxd":559
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@@ -94808,16 +95317,16 @@ static CYTHON_INLINE PyObject *__pyx_f_19dependency_injector_9providers___factor
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-        /* "dependency_injector/providers.pxd":565
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  *                 future.set_result(attributes)
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-        __Pyx_GetModuleGlobalName(__pyx_t_5, __pyx_n_s_asyncio); if (unlikely(!__pyx_t_5)) __PYX_ERR(0, 565, __pyx_L1_error)
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+        __pyx_t_2 = __Pyx_PyObject_GetAttrStr(__pyx_t_5, __pyx_n_s_Future); if (unlikely(!__pyx_t_2)) __PYX_ERR(0, 567, __pyx_L1_error)
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@@ -94832,20 +95341,20 @@ static CYTHON_INLINE PyObject *__pyx_f_19dependency_injector_9providers___factor
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-        /* "dependency_injector/providers.pxd":566
+        /* "dependency_injector/providers.pxd":568
  *             if not attributes_awaitable:
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  *                 future.set_result(attributes)             # <<<<<<<<<<<<<<
  *                 attributes = future
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@@ -94859,12 +95368,12 @@ static CYTHON_INLINE PyObject *__pyx_f_19dependency_injector_9providers___factor
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-        /* "dependency_injector/providers.pxd":567
+        /* "dependency_injector/providers.pxd":569
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  *                 attributes = future             # <<<<<<<<<<<<<<
@@ -94874,7 +95383,7 @@ static CYTHON_INLINE PyObject *__pyx_f_19dependency_injector_9providers___factor
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-        /* "dependency_injector/providers.pxd":564
+        /* "dependency_injector/providers.pxd":566
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  *             if not attributes_awaitable:             # <<<<<<<<<<<<<<
@@ -94883,7 +95392,7 @@ static CYTHON_INLINE PyObject *__pyx_f_19dependency_injector_9providers___factor
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-      /* "dependency_injector/providers.pxd":569
+      /* "dependency_injector/providers.pxd":571
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@@ -94891,13 +95400,13 @@ static CYTHON_INLINE PyObject *__pyx_f_19dependency_injector_9providers___factor
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-      __pyx_t_1 = __pyx_f_19dependency_injector_9providers___async_inject_attributes(__pyx_v_instance, __pyx_v_attributes); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 569, __pyx_L1_error)
+      __pyx_t_1 = __pyx_f_19dependency_injector_9providers___async_inject_attributes(__pyx_v_instance, __pyx_v_attributes); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 571, __pyx_L1_error)
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-      /* "dependency_injector/providers.pxd":558
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  *         if instance_awaitable or attributes_awaitable:             # <<<<<<<<<<<<<<
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-    /* "dependency_injector/providers.pxd":571
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  *         __inject_attributes(instance, attributes)             # <<<<<<<<<<<<<<
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-    /* "dependency_injector/providers.pxd":552
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-  /* "dependency_injector/providers.pxd":582
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  */
-  __Pyx_GetModuleGlobalName(__pyx_t_2, __pyx_n_s_inspect); if (unlikely(!__pyx_t_2)) __PYX_ERR(0, 585, __pyx_L1_error)
+  __Pyx_GetModuleGlobalName(__pyx_t_2, __pyx_n_s_inspect); if (unlikely(!__pyx_t_2)) __PYX_ERR(0, 587, __pyx_L1_error)
   __Pyx_GOTREF(__pyx_t_2);
-  __pyx_t_1 = __Pyx_HasAttr(__pyx_t_2, __pyx_n_s_isawaitable); if (unlikely(__pyx_t_1 == ((int)-1))) __PYX_ERR(0, 585, __pyx_L1_error)
+  __pyx_t_1 = __Pyx_HasAttr(__pyx_t_2, __pyx_n_s_isawaitable); if (unlikely(__pyx_t_1 == ((int)-1))) __PYX_ERR(0, 587, __pyx_L1_error)
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   __pyx_t_5 = (__pyx_t_1 != 0);
   if (__pyx_t_5) {
 
-    /* "dependency_injector/providers.pxd":586
+    /* "dependency_injector/providers.pxd":588
  * 
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  *         __has_isawaitable = True             # <<<<<<<<<<<<<<
@@ -95056,16 +95565,16 @@ static CYTHON_INLINE int __pyx_f_19dependency_injector_9providers___isawaitable(
  */
     __pyx_v_19dependency_injector_9providers___has_isawaitable = 1;
 
-    /* "dependency_injector/providers.pxd":587
+    /* "dependency_injector/providers.pxd":589
  *     if hasattr(inspect, 'isawaitable'):
  *         __has_isawaitable = True
  *         return inspect.isawaitable(instance)             # <<<<<<<<<<<<<<
  * 
  *     return False
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-    __Pyx_GetModuleGlobalName(__pyx_t_4, __pyx_n_s_inspect); if (unlikely(!__pyx_t_4)) __PYX_ERR(0, 587, __pyx_L1_error)
+    __Pyx_GetModuleGlobalName(__pyx_t_4, __pyx_n_s_inspect); if (unlikely(!__pyx_t_4)) __PYX_ERR(0, 589, __pyx_L1_error)
     __Pyx_GOTREF(__pyx_t_4);
-    __pyx_t_3 = __Pyx_PyObject_GetAttrStr(__pyx_t_4, __pyx_n_s_isawaitable); if (unlikely(!__pyx_t_3)) __PYX_ERR(0, 587, __pyx_L1_error)
+    __pyx_t_3 = __Pyx_PyObject_GetAttrStr(__pyx_t_4, __pyx_n_s_isawaitable); if (unlikely(!__pyx_t_3)) __PYX_ERR(0, 589, __pyx_L1_error)
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@@ -95080,15 +95589,15 @@ static CYTHON_INLINE int __pyx_f_19dependency_injector_9providers___isawaitable(
     }
     __pyx_t_2 = (__pyx_t_4) ? __Pyx_PyObject_Call2Args(__pyx_t_3, __pyx_t_4, __pyx_v_instance) : __Pyx_PyObject_CallOneArg(__pyx_t_3, __pyx_v_instance);
     __Pyx_XDECREF(__pyx_t_4); __pyx_t_4 = 0;
-    if (unlikely(!__pyx_t_2)) __PYX_ERR(0, 587, __pyx_L1_error)
+    if (unlikely(!__pyx_t_2)) __PYX_ERR(0, 589, __pyx_L1_error)
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-    __pyx_t_5 = __Pyx_PyObject_IsTrue(__pyx_t_2); if (unlikely((__pyx_t_5 == (int)-1) && PyErr_Occurred())) __PYX_ERR(0, 587, __pyx_L1_error)
+    __pyx_t_5 = __Pyx_PyObject_IsTrue(__pyx_t_2); if (unlikely((__pyx_t_5 == (int)-1) && PyErr_Occurred())) __PYX_ERR(0, 589, __pyx_L1_error)
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     goto __pyx_L0;
 
-    /* "dependency_injector/providers.pxd":585
+    /* "dependency_injector/providers.pxd":587
  *         return inspect.isawaitable(instance)
  * 
  *     if hasattr(inspect, 'isawaitable'):             # <<<<<<<<<<<<<<
@@ -95097,7 +95606,7 @@ static CYTHON_INLINE int __pyx_f_19dependency_injector_9providers___isawaitable(
  */
   }
 
-  /* "dependency_injector/providers.pxd":589
+  /* "dependency_injector/providers.pxd":591
  *         return inspect.isawaitable(instance)
  * 
  *     return False             # <<<<<<<<<<<<<<
@@ -95105,7 +95614,7 @@ static CYTHON_INLINE int __pyx_f_19dependency_injector_9providers___isawaitable(
   __pyx_r = 0;
   goto __pyx_L0;
 
-  /* "dependency_injector/providers.pxd":579
+  /* "dependency_injector/providers.pxd":581
  * 
  * 
  * cdef inline bint __isawaitable(object instance):             # <<<<<<<<<<<<<<
@@ -97165,17 +97674,19 @@ static PyMethodDef __pyx_methods_19dependency_injector_9providers_ConfigurationO
   {"as_int", (PyCFunction)__pyx_pw_19dependency_injector_9providers_19ConfigurationOption_19as_int, METH_NOARGS, 0},
   {"as_float", (PyCFunction)__pyx_pw_19dependency_injector_9providers_19ConfigurationOption_21as_float, METH_NOARGS, 0},
   {"as_", (PyCFunction)(void*)(PyCFunctionWithKeywords)__pyx_pw_19dependency_injector_9providers_19ConfigurationOption_23as_, METH_VARARGS|METH_KEYWORDS, 0},
-  {"override", (PyCFunction)__pyx_pw_19dependency_injector_9providers_19ConfigurationOption_25override, METH_O, 0},
-  {"reset_last_overriding", (PyCFunction)__pyx_pw_19dependency_injector_9providers_19ConfigurationOption_27reset_last_overriding, METH_NOARGS, 0},
-  {"reset_override", (PyCFunction)__pyx_pw_19dependency_injector_9providers_19ConfigurationOption_29reset_override, METH_NOARGS, 0},
-  {"reset_cache", (PyCFunction)__pyx_pw_19dependency_injector_9providers_19ConfigurationOption_31reset_cache, METH_NOARGS, 0},
-  {"update", (PyCFunction)__pyx_pw_19dependency_injector_9providers_19ConfigurationOption_33update, METH_O, __pyx_doc_19dependency_injector_9providers_19ConfigurationOption_32update},
-  {"from_ini", (PyCFunction)__pyx_pw_19dependency_injector_9providers_19ConfigurationOption_35from_ini, METH_O, __pyx_doc_19dependency_injector_9providers_19ConfigurationOption_34from_ini},
-  {"from_yaml", (PyCFunction)__pyx_pw_19dependency_injector_9providers_19ConfigurationOption_37from_yaml, METH_O, __pyx_doc_19dependency_injector_9providers_19ConfigurationOption_36from_yaml},
-  {"from_dict", (PyCFunction)__pyx_pw_19dependency_injector_9providers_19ConfigurationOption_39from_dict, METH_O, __pyx_doc_19dependency_injector_9providers_19ConfigurationOption_38from_dict},
-  {"from_env", (PyCFunction)(void*)(PyCFunctionWithKeywords)__pyx_pw_19dependency_injector_9providers_19ConfigurationOption_41from_env, METH_VARARGS|METH_KEYWORDS, __pyx_doc_19dependency_injector_9providers_19ConfigurationOption_40from_env},
-  {"__reduce_cython__", (PyCFunction)__pyx_pw_19dependency_injector_9providers_19ConfigurationOption_43__reduce_cython__, METH_NOARGS, 0},
-  {"__setstate_cython__", (PyCFunction)__pyx_pw_19dependency_injector_9providers_19ConfigurationOption_45__setstate_cython__, METH_O, 0},
+  {"required", (PyCFunction)__pyx_pw_19dependency_injector_9providers_19ConfigurationOption_25required, METH_NOARGS, 0},
+  {"is_required", (PyCFunction)__pyx_pw_19dependency_injector_9providers_19ConfigurationOption_27is_required, METH_NOARGS, 0},
+  {"override", (PyCFunction)__pyx_pw_19dependency_injector_9providers_19ConfigurationOption_29override, METH_O, 0},
+  {"reset_last_overriding", (PyCFunction)__pyx_pw_19dependency_injector_9providers_19ConfigurationOption_31reset_last_overriding, METH_NOARGS, 0},
+  {"reset_override", (PyCFunction)__pyx_pw_19dependency_injector_9providers_19ConfigurationOption_33reset_override, METH_NOARGS, 0},
+  {"reset_cache", (PyCFunction)__pyx_pw_19dependency_injector_9providers_19ConfigurationOption_35reset_cache, METH_NOARGS, 0},
+  {"update", (PyCFunction)__pyx_pw_19dependency_injector_9providers_19ConfigurationOption_37update, METH_O, __pyx_doc_19dependency_injector_9providers_19ConfigurationOption_36update},
+  {"from_ini", (PyCFunction)__pyx_pw_19dependency_injector_9providers_19ConfigurationOption_39from_ini, METH_O, __pyx_doc_19dependency_injector_9providers_19ConfigurationOption_38from_ini},
+  {"from_yaml", (PyCFunction)__pyx_pw_19dependency_injector_9providers_19ConfigurationOption_41from_yaml, METH_O, __pyx_doc_19dependency_injector_9providers_19ConfigurationOption_40from_yaml},
+  {"from_dict", (PyCFunction)__pyx_pw_19dependency_injector_9providers_19ConfigurationOption_43from_dict, METH_O, __pyx_doc_19dependency_injector_9providers_19ConfigurationOption_42from_dict},
+  {"from_env", (PyCFunction)(void*)(PyCFunctionWithKeywords)__pyx_pw_19dependency_injector_9providers_19ConfigurationOption_45from_env, METH_VARARGS|METH_KEYWORDS, __pyx_doc_19dependency_injector_9providers_19ConfigurationOption_44from_env},
+  {"__reduce_cython__", (PyCFunction)__pyx_pw_19dependency_injector_9providers_19ConfigurationOption_47__reduce_cython__, METH_NOARGS, 0},
+  {"__setstate_cython__", (PyCFunction)__pyx_pw_19dependency_injector_9providers_19ConfigurationOption_49__setstate_cython__, METH_O, 0},
   {0, 0, 0, 0}
 };
 
@@ -97457,7 +97968,7 @@ static PyMethodDef __pyx_methods_19dependency_injector_9providers_Configuration[
   {"__deepcopy__", (PyCFunction)__pyx_pw_19dependency_injector_9providers_13Configuration_3__deepcopy__, METH_O, 0},
   {"__getattr__", (PyCFunction)__pyx_pw_19dependency_injector_9providers_13Configuration_7__getattr__, METH_O|METH_COEXIST, 0},
   {"get_name", (PyCFunction)__pyx_pw_19dependency_injector_9providers_13Configuration_11get_name, METH_NOARGS, 0},
-  {"get", (PyCFunction)__pyx_pw_19dependency_injector_9providers_13Configuration_13get, METH_O, __pyx_doc_19dependency_injector_9providers_13Configuration_12get},
+  {"get", (PyCFunction)(void*)(PyCFunctionWithKeywords)__pyx_pw_19dependency_injector_9providers_13Configuration_13get, METH_VARARGS|METH_KEYWORDS, __pyx_doc_19dependency_injector_9providers_13Configuration_12get},
   {"set", (PyCFunction)(void*)(PyCFunctionWithKeywords)__pyx_pw_19dependency_injector_9providers_13Configuration_15set, METH_VARARGS|METH_KEYWORDS, __pyx_doc_19dependency_injector_9providers_13Configuration_14set},
   {"override", (PyCFunction)__pyx_pw_19dependency_injector_9providers_13Configuration_17override, METH_O, __pyx_doc_19dependency_injector_9providers_13Configuration_16override},
   {"reset_last_overriding", (PyCFunction)__pyx_pw_19dependency_injector_9providers_13Configuration_19reset_last_overriding, METH_NOARGS, __pyx_doc_19dependency_injector_9providers_13Configuration_18reset_last_overriding},
@@ -101749,17 +102260,17 @@ static __Pyx_StringTabEntry __pyx_string_tab[] = {
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   {&__pyx_n_s_IS_PROVIDER, __pyx_k_IS_PROVIDER, sizeof(__pyx_k_IS_PROVIDER), 0, 0, 1, 1},
   {&__pyx_n_s_ImportError, __pyx_k_ImportError, sizeof(__pyx_k_ImportError), 0, 0, 1, 1},
+  {&__pyx_kp_s_Incompatible_checksums_s_vs_0x10, __pyx_k_Incompatible_checksums_s_vs_0x10, sizeof(__pyx_k_Incompatible_checksums_s_vs_0x10), 0, 0, 1, 0},
   {&__pyx_kp_s_Incompatible_checksums_s_vs_0x1b, __pyx_k_Incompatible_checksums_s_vs_0x1b, sizeof(__pyx_k_Incompatible_checksums_s_vs_0x1b), 0, 0, 1, 0},
   {&__pyx_kp_s_Incompatible_checksums_s_vs_0x1c, __pyx_k_Incompatible_checksums_s_vs_0x1c, sizeof(__pyx_k_Incompatible_checksums_s_vs_0x1c), 0, 0, 1, 0},
   {&__pyx_kp_s_Incompatible_checksums_s_vs_0x20, __pyx_k_Incompatible_checksums_s_vs_0x20, sizeof(__pyx_k_Incompatible_checksums_s_vs_0x20), 0, 0, 1, 0},
   {&__pyx_kp_s_Incompatible_checksums_s_vs_0x2a, __pyx_k_Incompatible_checksums_s_vs_0x2a, sizeof(__pyx_k_Incompatible_checksums_s_vs_0x2a), 0, 0, 1, 0},
   {&__pyx_kp_s_Incompatible_checksums_s_vs_0x2e, __pyx_k_Incompatible_checksums_s_vs_0x2e, sizeof(__pyx_k_Incompatible_checksums_s_vs_0x2e), 0, 0, 1, 0},
   {&__pyx_kp_s_Incompatible_checksums_s_vs_0x32, __pyx_k_Incompatible_checksums_s_vs_0x32, sizeof(__pyx_k_Incompatible_checksums_s_vs_0x32), 0, 0, 1, 0},
-  {&__pyx_kp_s_Incompatible_checksums_s_vs_0x34, __pyx_k_Incompatible_checksums_s_vs_0x34, sizeof(__pyx_k_Incompatible_checksums_s_vs_0x34), 0, 0, 1, 0},
   {&__pyx_kp_s_Incompatible_checksums_s_vs_0x3e, __pyx_k_Incompatible_checksums_s_vs_0x3e, sizeof(__pyx_k_Incompatible_checksums_s_vs_0x3e), 0, 0, 1, 0},
   {&__pyx_kp_s_Incompatible_checksums_s_vs_0x42, __pyx_k_Incompatible_checksums_s_vs_0x42, sizeof(__pyx_k_Incompatible_checksums_s_vs_0x42), 0, 0, 1, 0},
+  {&__pyx_kp_s_Incompatible_checksums_s_vs_0x42_2, __pyx_k_Incompatible_checksums_s_vs_0x42_2, sizeof(__pyx_k_Incompatible_checksums_s_vs_0x42_2), 0, 0, 1, 0},
   {&__pyx_kp_s_Incompatible_checksums_s_vs_0x64, __pyx_k_Incompatible_checksums_s_vs_0x64, sizeof(__pyx_k_Incompatible_checksums_s_vs_0x64), 0, 0, 1, 0},
-  {&__pyx_kp_s_Incompatible_checksums_s_vs_0x66, __pyx_k_Incompatible_checksums_s_vs_0x66, sizeof(__pyx_k_Incompatible_checksums_s_vs_0x66), 0, 0, 1, 0},
   {&__pyx_kp_s_Incompatible_checksums_s_vs_0x6a, __pyx_k_Incompatible_checksums_s_vs_0x6a, sizeof(__pyx_k_Incompatible_checksums_s_vs_0x6a), 0, 0, 1, 0},
   {&__pyx_kp_s_Incompatible_checksums_s_vs_0x73, __pyx_k_Incompatible_checksums_s_vs_0x73, sizeof(__pyx_k_Incompatible_checksums_s_vs_0x73), 0, 0, 1, 0},
   {&__pyx_kp_s_Incompatible_checksums_s_vs_0x75, __pyx_k_Incompatible_checksums_s_vs_0x75, sizeof(__pyx_k_Incompatible_checksums_s_vs_0x75), 0, 0, 1, 0},
@@ -101813,6 +102324,7 @@ static __Pyx_StringTabEntry __pyx_string_tab[] = {
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+  {&__pyx_kp_s_Undefined_configuration_option_0, __pyx_k_Undefined_configuration_option_0, sizeof(__pyx_k_Undefined_configuration_option_0), 0, 0, 1, 0},
   {&__pyx_kp_s_Unknown_type_of_resource_initial, __pyx_k_Unknown_type_of_resource_initial, sizeof(__pyx_k_Unknown_type_of_resource_initial), 0, 0, 1, 0},
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   {&__pyx_n_s_ref, __pyx_k_ref, sizeof(__pyx_k_ref), 0, 0, 1, 1},
+  {&__pyx_n_s_required, __pyx_k_required, sizeof(__pyx_k_required), 0, 0, 1, 1},
   {&__pyx_n_s_reset, __pyx_k_reset, sizeof(__pyx_k_reset), 0, 0, 1, 1},
   {&__pyx_n_s_reset_cache, __pyx_k_reset_cache, sizeof(__pyx_k_reset_cache), 0, 0, 1, 1},
   {&__pyx_n_s_reset_last_overriding, __pyx_k_reset_last_overriding, sizeof(__pyx_k_reset_last_overriding), 0, 0, 1, 1},
@@ -102074,6 +102587,7 @@ static __Pyx_StringTabEntry __pyx_string_tab[] = {
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   {&__pyx_n_s_str___locals_genexpr, __pyx_k_str___locals_genexpr, sizeof(__pyx_k_str___locals_genexpr), 0, 0, 1, 1},
+  {&__pyx_n_s_strict, __pyx_k_strict, sizeof(__pyx_k_strict), 0, 0, 1, 1},
   {&__pyx_kp_s_stringsource, __pyx_k_stringsource, sizeof(__pyx_k_stringsource), 0, 0, 1, 0},
   {&__pyx_n_s_super, __pyx_k_super, sizeof(__pyx_k_super), 0, 0, 1, 1},
   {&__pyx_n_s_sys, __pyx_k_sys, sizeof(__pyx_k_sys), 0, 0, 1, 1},
@@ -102097,10 +102611,10 @@ static __Pyx_StringTabEntry __pyx_string_tab[] = {
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 static CYTHON_SMALL_CODE int __Pyx_InitCachedBuiltins(void) {
   __pyx_builtin_ImportError = __Pyx_GetBuiltinName(__pyx_n_s_ImportError); if (!__pyx_builtin_ImportError) __PYX_ERR(0, 5, __pyx_L1_error)
-  __pyx_builtin_range = __Pyx_GetBuiltinName(__pyx_n_s_range); if (!__pyx_builtin_range) __PYX_ERR(0, 353, __pyx_L1_error)
-  __pyx_builtin_zip = __Pyx_GetBuiltinName(__pyx_n_s_zip); if (!__pyx_builtin_zip) __PYX_ERR(0, 432, __pyx_L1_error)
+  __pyx_builtin_range = __Pyx_GetBuiltinName(__pyx_n_s_range); if (!__pyx_builtin_range) __PYX_ERR(0, 355, __pyx_L1_error)
+  __pyx_builtin_zip = __Pyx_GetBuiltinName(__pyx_n_s_zip); if (!__pyx_builtin_zip) __PYX_ERR(0, 434, __pyx_L1_error)
   __pyx_builtin_object = __Pyx_GetBuiltinName(__pyx_n_s_object); if (!__pyx_builtin_object) __PYX_ERR(1, 510, __pyx_L1_error)
-  __pyx_builtin_staticmethod = __Pyx_GetBuiltinName(__pyx_n_s_staticmethod); if (!__pyx_builtin_staticmethod) __PYX_ERR(1, 3011, __pyx_L1_error)
+  __pyx_builtin_staticmethod = __Pyx_GetBuiltinName(__pyx_n_s_staticmethod); if (!__pyx_builtin_staticmethod) __PYX_ERR(1, 3026, __pyx_L1_error)
   __pyx_builtin_super = __Pyx_GetBuiltinName(__pyx_n_s_super); if (!__pyx_builtin_super) __PYX_ERR(1, 70, __pyx_L1_error)
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@@ -102110,9 +102624,9 @@ static CYTHON_SMALL_CODE int __Pyx_InitCachedBuiltins(void) {
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   __pyx_builtin_AttributeError = __Pyx_GetBuiltinName(__pyx_n_s_AttributeError); if (!__pyx_builtin_AttributeError) __PYX_ERR(1, 704, __pyx_L1_error)
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-  __pyx_builtin_hex = __Pyx_GetBuiltinName(__pyx_n_s_hex); if (!__pyx_builtin_hex) __PYX_ERR(1, 3175, __pyx_L1_error)
+  __pyx_builtin_KeyError = __Pyx_GetBuiltinName(__pyx_n_s_KeyError); if (!__pyx_builtin_KeyError) __PYX_ERR(1, 2032, __pyx_L1_error)
+  __pyx_builtin_StopIteration = __Pyx_GetBuiltinName(__pyx_n_s_StopIteration); if (!__pyx_builtin_StopIteration) __PYX_ERR(1, 2891, __pyx_L1_error)
+  __pyx_builtin_hex = __Pyx_GetBuiltinName(__pyx_n_s_hex); if (!__pyx_builtin_hex) __PYX_ERR(1, 3190, __pyx_L1_error)
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@@ -102155,25 +102669,25 @@ static CYTHON_SMALL_CODE int __Pyx_InitCachedConstants(void) {
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   __Pyx_GIVEREF(__pyx_tuple__6);
 
-  /* "dependency_injector/providers.pyx":2018
+  /* "dependency_injector/providers.pyx":2033
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-  /* "dependency_injector/providers.pyx":3013
+  /* "dependency_injector/providers.pyx":3028
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@@ -102259,89 +102773,89 @@ static CYTHON_SMALL_CODE int __Pyx_InitCachedConstants(void) {
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-  /* "dependency_injector/providers.pyx":3012
+  /* "dependency_injector/providers.pyx":3027
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+  __pyx_codeobj__30 = (PyObject*)__Pyx_PyCode_New(1, 0, 2, 0, CO_OPTIMIZED|CO_NEWLOCALS, __pyx_empty_bytes, __pyx_empty_tuple, __pyx_empty_tuple, __pyx_tuple__29, __pyx_empty_tuple, __pyx_empty_tuple, __pyx_kp_s_src_dependency_injector_provider, __pyx_n_s_is_resource_subclass, 3027, __pyx_empty_bytes); if (unlikely(!__pyx_codeobj__30)) __PYX_ERR(1, 3027, __pyx_L1_error)
 
-  /* "dependency_injector/providers.pyx":3021
+  /* "dependency_injector/providers.pyx":3036
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+  __pyx_tuple__31 = PyTuple_Pack(2, __pyx_n_s_instance, __pyx_n_s_resources); if (unlikely(!__pyx_tuple__31)) __PYX_ERR(1, 3036, __pyx_L1_error)
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+  __pyx_codeobj__32 = (PyObject*)__Pyx_PyCode_New(1, 0, 2, 0, CO_OPTIMIZED|CO_NEWLOCALS, __pyx_empty_bytes, __pyx_empty_tuple, __pyx_empty_tuple, __pyx_tuple__31, __pyx_empty_tuple, __pyx_empty_tuple, __pyx_kp_s_src_dependency_injector_provider, __pyx_n_s_is_async_resource_subclass, 3036, __pyx_empty_bytes); if (unlikely(!__pyx_codeobj__32)) __PYX_ERR(1, 3036, __pyx_L1_error)
 
-  /* "dependency_injector/providers.pyx":3662
+  /* "dependency_injector/providers.pyx":3677
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  * def __add_sys_streams(memo):             # <<<<<<<<<<<<<<
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-  __pyx_tuple__33 = PyTuple_Pack(1, __pyx_n_s_memo); if (unlikely(!__pyx_tuple__33)) __PYX_ERR(1, 3662, __pyx_L1_error)
+  __pyx_tuple__33 = PyTuple_Pack(1, __pyx_n_s_memo); if (unlikely(!__pyx_tuple__33)) __PYX_ERR(1, 3677, __pyx_L1_error)
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+  __pyx_codeobj__34 = (PyObject*)__Pyx_PyCode_New(1, 0, 1, 0, CO_OPTIMIZED|CO_NEWLOCALS, __pyx_empty_bytes, __pyx_empty_tuple, __pyx_empty_tuple, __pyx_tuple__33, __pyx_empty_tuple, __pyx_empty_tuple, __pyx_kp_s_src_dependency_injector_provider, __pyx_n_s_add_sys_streams, 3677, __pyx_empty_bytes); if (unlikely(!__pyx_codeobj__34)) __PYX_ERR(1, 3677, __pyx_L1_error)
 
-  /* "dependency_injector/providers.pyx":3673
+  /* "dependency_injector/providers.pyx":3688
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  * 
  * def merge_dicts(dict1, dict2):             # <<<<<<<<<<<<<<
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+  __pyx_tuple__35 = PyTuple_Pack(5, __pyx_n_s_dict1, __pyx_n_s_dict2, __pyx_n_s_key, __pyx_n_s_value, __pyx_n_s_result); if (unlikely(!__pyx_tuple__35)) __PYX_ERR(1, 3688, __pyx_L1_error)
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+  __pyx_codeobj__36 = (PyObject*)__Pyx_PyCode_New(2, 0, 5, 0, CO_OPTIMIZED|CO_NEWLOCALS, __pyx_empty_bytes, __pyx_empty_tuple, __pyx_empty_tuple, __pyx_tuple__35, __pyx_empty_tuple, __pyx_empty_tuple, __pyx_kp_s_src_dependency_injector_provider, __pyx_n_s_merge_dicts, 3688, __pyx_empty_bytes); if (unlikely(!__pyx_codeobj__36)) __PYX_ERR(1, 3688, __pyx_L1_error)
 
-  /* "dependency_injector/providers.pyx":3694
+  /* "dependency_injector/providers.pyx":3709
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  * 
  * def isawaitable(obj):             # <<<<<<<<<<<<<<
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-  __pyx_tuple__37 = PyTuple_Pack(1, __pyx_n_s_obj); if (unlikely(!__pyx_tuple__37)) __PYX_ERR(1, 3694, __pyx_L1_error)
+  __pyx_tuple__37 = PyTuple_Pack(1, __pyx_n_s_obj); if (unlikely(!__pyx_tuple__37)) __PYX_ERR(1, 3709, __pyx_L1_error)
   __Pyx_GOTREF(__pyx_tuple__37);
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+  __pyx_codeobj__38 = (PyObject*)__Pyx_PyCode_New(1, 0, 1, 0, CO_OPTIMIZED|CO_NEWLOCALS, __pyx_empty_bytes, __pyx_empty_tuple, __pyx_empty_tuple, __pyx_tuple__37, __pyx_empty_tuple, __pyx_empty_tuple, __pyx_kp_s_src_dependency_injector_provider, __pyx_n_s_isawaitable, 3709, __pyx_empty_bytes); if (unlikely(!__pyx_codeobj__38)) __PYX_ERR(1, 3709, __pyx_L1_error)
 
-  /* "dependency_injector/providers.pyx":3705
+  /* "dependency_injector/providers.pyx":3720
  * 
  * 
  * def iscoroutinefunction(obj):             # <<<<<<<<<<<<<<
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-  __pyx_tuple__39 = PyTuple_Pack(1, __pyx_n_s_obj); if (unlikely(!__pyx_tuple__39)) __PYX_ERR(1, 3705, __pyx_L1_error)
+  __pyx_tuple__39 = PyTuple_Pack(1, __pyx_n_s_obj); if (unlikely(!__pyx_tuple__39)) __PYX_ERR(1, 3720, __pyx_L1_error)
   __Pyx_GOTREF(__pyx_tuple__39);
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-  __pyx_codeobj__40 = (PyObject*)__Pyx_PyCode_New(1, 0, 1, 0, CO_OPTIMIZED|CO_NEWLOCALS, __pyx_empty_bytes, __pyx_empty_tuple, __pyx_empty_tuple, __pyx_tuple__39, __pyx_empty_tuple, __pyx_empty_tuple, __pyx_kp_s_src_dependency_injector_provider, __pyx_n_s_iscoroutinefunction, 3705, __pyx_empty_bytes); if (unlikely(!__pyx_codeobj__40)) __PYX_ERR(1, 3705, __pyx_L1_error)
+  __pyx_codeobj__40 = (PyObject*)__Pyx_PyCode_New(1, 0, 1, 0, CO_OPTIMIZED|CO_NEWLOCALS, __pyx_empty_bytes, __pyx_empty_tuple, __pyx_empty_tuple, __pyx_tuple__39, __pyx_empty_tuple, __pyx_empty_tuple, __pyx_kp_s_src_dependency_injector_provider, __pyx_n_s_iscoroutinefunction, 3720, __pyx_empty_bytes); if (unlikely(!__pyx_codeobj__40)) __PYX_ERR(1, 3720, __pyx_L1_error)
 
-  /* "dependency_injector/providers.pyx":3716
+  /* "dependency_injector/providers.pyx":3731
  * 
  * 
  * def isasyncgenfunction(obj):             # <<<<<<<<<<<<<<
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-  __pyx_tuple__41 = PyTuple_Pack(1, __pyx_n_s_obj); if (unlikely(!__pyx_tuple__41)) __PYX_ERR(1, 3716, __pyx_L1_error)
+  __pyx_tuple__41 = PyTuple_Pack(1, __pyx_n_s_obj); if (unlikely(!__pyx_tuple__41)) __PYX_ERR(1, 3731, __pyx_L1_error)
   __Pyx_GOTREF(__pyx_tuple__41);
   __Pyx_GIVEREF(__pyx_tuple__41);
-  __pyx_codeobj__42 = (PyObject*)__Pyx_PyCode_New(1, 0, 1, 0, CO_OPTIMIZED|CO_NEWLOCALS, __pyx_empty_bytes, __pyx_empty_tuple, __pyx_empty_tuple, __pyx_tuple__41, __pyx_empty_tuple, __pyx_empty_tuple, __pyx_kp_s_src_dependency_injector_provider, __pyx_n_s_isasyncgenfunction, 3716, __pyx_empty_bytes); if (unlikely(!__pyx_codeobj__42)) __PYX_ERR(1, 3716, __pyx_L1_error)
+  __pyx_codeobj__42 = (PyObject*)__Pyx_PyCode_New(1, 0, 1, 0, CO_OPTIMIZED|CO_NEWLOCALS, __pyx_empty_bytes, __pyx_empty_tuple, __pyx_empty_tuple, __pyx_tuple__41, __pyx_empty_tuple, __pyx_empty_tuple, __pyx_kp_s_src_dependency_injector_provider, __pyx_n_s_isasyncgenfunction, 3731, __pyx_empty_bytes); if (unlikely(!__pyx_codeobj__42)) __PYX_ERR(1, 3731, __pyx_L1_error)
 
   /* "(tree fragment)":1
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@@ -102541,17 +103055,17 @@ static CYTHON_SMALL_CODE int __Pyx_InitGlobals(void) {
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   __pyx_int_3 = PyInt_FromLong(3); if (unlikely(!__pyx_int_3)) __PYX_ERR(1, 1, __pyx_L1_error)
   __pyx_int_5 = PyInt_FromLong(5); if (unlikely(!__pyx_int_5)) __PYX_ERR(1, 1, __pyx_L1_error)
+  __pyx_int_16903407 = PyInt_FromLong(16903407L); if (unlikely(!__pyx_int_16903407)) __PYX_ERR(1, 1, __pyx_L1_error)
   __pyx_int_29181932 = PyInt_FromLong(29181932L); if (unlikely(!__pyx_int_29181932)) __PYX_ERR(1, 1, __pyx_L1_error)
   __pyx_int_30383981 = PyInt_FromLong(30383981L); if (unlikely(!__pyx_int_30383981)) __PYX_ERR(1, 1, __pyx_L1_error)
   __pyx_int_34020203 = PyInt_FromLong(34020203L); if (unlikely(!__pyx_int_34020203)) __PYX_ERR(1, 1, __pyx_L1_error)
   __pyx_int_44395068 = PyInt_FromLong(44395068L); if (unlikely(!__pyx_int_44395068)) __PYX_ERR(1, 1, __pyx_L1_error)
   __pyx_int_48353679 = PyInt_FromLong(48353679L); if (unlikely(!__pyx_int_48353679)) __PYX_ERR(1, 1, __pyx_L1_error)
   __pyx_int_52983931 = PyInt_FromLong(52983931L); if (unlikely(!__pyx_int_52983931)) __PYX_ERR(1, 1, __pyx_L1_error)
-  __pyx_int_54922531 = PyInt_FromLong(54922531L); if (unlikely(!__pyx_int_54922531)) __PYX_ERR(1, 1, __pyx_L1_error)
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   __pyx_int_69951814 = PyInt_FromLong(69951814L); if (unlikely(!__pyx_int_69951814)) __PYX_ERR(1, 1, __pyx_L1_error)
+  __pyx_int_70248545 = PyInt_FromLong(70248545L); if (unlikely(!__pyx_int_70248545)) __PYX_ERR(1, 1, __pyx_L1_error)
   __pyx_int_105855327 = PyInt_FromLong(105855327L); if (unlikely(!__pyx_int_105855327)) __PYX_ERR(1, 1, __pyx_L1_error)
-  __pyx_int_107726368 = PyInt_FromLong(107726368L); if (unlikely(!__pyx_int_107726368)) __PYX_ERR(1, 1, __pyx_L1_error)
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   __pyx_int_122966839 = PyInt_FromLong(122966839L); if (unlikely(!__pyx_int_122966839)) __PYX_ERR(1, 1, __pyx_L1_error)
@@ -103094,34 +103608,34 @@ static int __Pyx_modinit_type_init_code(void) {
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   __pyx_type_19dependency_injector_9providers_TypedConfigurationOption.tp_base = __pyx_ptype_19dependency_injector_9providers_Callable;
-  if (PyType_Ready(&__pyx_type_19dependency_injector_9providers_TypedConfigurationOption) < 0) __PYX_ERR(1, 1371, __pyx_L1_error)
+  if (PyType_Ready(&__pyx_type_19dependency_injector_9providers_TypedConfigurationOption) < 0) __PYX_ERR(1, 1378, __pyx_L1_error)
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-  if (__Pyx_SetVtable(__pyx_type_19dependency_injector_9providers_TypedConfigurationOption.tp_dict, __pyx_vtabptr_19dependency_injector_9providers_TypedConfigurationOption) < 0) __PYX_ERR(1, 1371, __pyx_L1_error)
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-  if (__Pyx_setup_reduce((PyObject*)&__pyx_type_19dependency_injector_9providers_TypedConfigurationOption) < 0) __PYX_ERR(1, 1371, __pyx_L1_error)
+  if (__Pyx_SetVtable(__pyx_type_19dependency_injector_9providers_TypedConfigurationOption.tp_dict, __pyx_vtabptr_19dependency_injector_9providers_TypedConfigurationOption) < 0) __PYX_ERR(1, 1378, __pyx_L1_error)
+  if (PyObject_SetAttr(__pyx_m, __pyx_n_s_TypedConfigurationOption, (PyObject *)&__pyx_type_19dependency_injector_9providers_TypedConfigurationOption) < 0) __PYX_ERR(1, 1378, __pyx_L1_error)
+  if (__Pyx_setup_reduce((PyObject*)&__pyx_type_19dependency_injector_9providers_TypedConfigurationOption) < 0) __PYX_ERR(1, 1378, __pyx_L1_error)
   __pyx_ptype_19dependency_injector_9providers_TypedConfigurationOption = &__pyx_type_19dependency_injector_9providers_TypedConfigurationOption;
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   __pyx_vtable_19dependency_injector_9providers_Configuration.__pyx_base = *__pyx_vtabptr_19dependency_injector_9providers_Object;
   __pyx_type_19dependency_injector_9providers_Configuration.tp_base = __pyx_ptype_19dependency_injector_9providers_Object;
-  if (PyType_Ready(&__pyx_type_19dependency_injector_9providers_Configuration) < 0) __PYX_ERR(1, 1378, __pyx_L1_error)
+  if (PyType_Ready(&__pyx_type_19dependency_injector_9providers_Configuration) < 0) __PYX_ERR(1, 1385, __pyx_L1_error)
   #if PY_VERSION_HEX < 0x030800B1
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-  if (__Pyx_SetVtable(__pyx_type_19dependency_injector_9providers_Configuration.tp_dict, __pyx_vtabptr_19dependency_injector_9providers_Configuration) < 0) __PYX_ERR(1, 1378, __pyx_L1_error)
-  if (PyObject_SetAttr(__pyx_m, __pyx_n_s_Configuration, (PyObject *)&__pyx_type_19dependency_injector_9providers_Configuration) < 0) __PYX_ERR(1, 1378, __pyx_L1_error)
+  if (__Pyx_SetVtable(__pyx_type_19dependency_injector_9providers_Configuration.tp_dict, __pyx_vtabptr_19dependency_injector_9providers_Configuration) < 0) __PYX_ERR(1, 1385, __pyx_L1_error)
+  if (PyObject_SetAttr(__pyx_m, __pyx_n_s_Configuration, (PyObject *)&__pyx_type_19dependency_injector_9providers_Configuration) < 0) __PYX_ERR(1, 1385, __pyx_L1_error)
   if (__pyx_type_19dependency_injector_9providers_Configuration.tp_weaklistoffset == 0) __pyx_type_19dependency_injector_9providers_Configuration.tp_weaklistoffset = offsetof(struct __pyx_obj_19dependency_injector_9providers_Configuration, __weakref__);
-  if (__Pyx_setup_reduce((PyObject*)&__pyx_type_19dependency_injector_9providers_Configuration) < 0) __PYX_ERR(1, 1378, __pyx_L1_error)
+  if (__Pyx_setup_reduce((PyObject*)&__pyx_type_19dependency_injector_9providers_Configuration) < 0) __PYX_ERR(1, 1385, __pyx_L1_error)
   __pyx_ptype_19dependency_injector_9providers_Configuration = &__pyx_type_19dependency_injector_9providers_Configuration;
   __pyx_vtabptr_19dependency_injector_9providers_Factory = &__pyx_vtable_19dependency_injector_9providers_Factory;
   __pyx_vtable_19dependency_injector_9providers_Factory.__pyx_base = *__pyx_vtabptr_19dependency_injector_9providers_Provider;
   __pyx_vtable_19dependency_injector_9providers_Factory.__pyx_base._provide = (PyObject *(*)(struct __pyx_obj_19dependency_injector_9providers_Provider *, PyObject *, PyObject *, int __pyx_skip_dispatch))__pyx_f_19dependency_injector_9providers_7Factory__provide;
   __pyx_type_19dependency_injector_9providers_Factory.tp_base = __pyx_ptype_19dependency_injector_9providers_Provider;
-  if (PyType_Ready(&__pyx_type_19dependency_injector_9providers_Factory) < 0) __PYX_ERR(1, 1637, __pyx_L1_error)
+  if (PyType_Ready(&__pyx_type_19dependency_injector_9providers_Factory) < 0) __PYX_ERR(1, 1652, __pyx_L1_error)
   #if PY_VERSION_HEX < 0x030800B1
   __pyx_type_19dependency_injector_9providers_Factory.tp_print = 0;
   #endif
@@ -103130,7 +103644,7 @@ static int __Pyx_modinit_type_init_code(void) {
   }
   #if CYTHON_COMPILING_IN_CPYTHON
   {
-    PyObject *wrapper = PyObject_GetAttrString((PyObject *)&__pyx_type_19dependency_injector_9providers_Factory, "__init__"); if (unlikely(!wrapper)) __PYX_ERR(1, 1637, __pyx_L1_error)
+    PyObject *wrapper = PyObject_GetAttrString((PyObject *)&__pyx_type_19dependency_injector_9providers_Factory, "__init__"); if (unlikely(!wrapper)) __PYX_ERR(1, 1652, __pyx_L1_error)
     if (Py_TYPE(wrapper) == &PyWrapperDescr_Type) {
       __pyx_wrapperbase_19dependency_injector_9providers_7Factory___init__ = *((PyWrapperDescrObject *)wrapper)->d_base;
       __pyx_wrapperbase_19dependency_injector_9providers_7Factory___init__.doc = __pyx_doc_19dependency_injector_9providers_7Factory___init__;
@@ -103140,7 +103654,7 @@ static int __Pyx_modinit_type_init_code(void) {
   #endif
   #if CYTHON_COMPILING_IN_CPYTHON
   {
-    PyObject *wrapper = PyObject_GetAttrString((PyObject *)&__pyx_type_19dependency_injector_9providers_Factory, "__str__"); if (unlikely(!wrapper)) __PYX_ERR(1, 1637, __pyx_L1_error)
+    PyObject *wrapper = PyObject_GetAttrString((PyObject *)&__pyx_type_19dependency_injector_9providers_Factory, "__str__"); if (unlikely(!wrapper)) __PYX_ERR(1, 1652, __pyx_L1_error)
     if (Py_TYPE(wrapper) == &PyWrapperDescr_Type) {
       __pyx_wrapperbase_19dependency_injector_9providers_7Factory_4__str__ = *((PyWrapperDescrObject *)wrapper)->d_base;
       __pyx_wrapperbase_19dependency_injector_9providers_7Factory_4__str__.doc = __pyx_doc_19dependency_injector_9providers_7Factory_4__str__;
@@ -103148,29 +103662,29 @@ static int __Pyx_modinit_type_init_code(void) {
     }
   }
   #endif
-  if (__Pyx_SetVtable(__pyx_type_19dependency_injector_9providers_Factory.tp_dict, __pyx_vtabptr_19dependency_injector_9providers_Factory) < 0) __PYX_ERR(1, 1637, __pyx_L1_error)
-  if (PyObject_SetAttr(__pyx_m, __pyx_n_s_Factory, (PyObject *)&__pyx_type_19dependency_injector_9providers_Factory) < 0) __PYX_ERR(1, 1637, __pyx_L1_error)
-  if (__Pyx_setup_reduce((PyObject*)&__pyx_type_19dependency_injector_9providers_Factory) < 0) __PYX_ERR(1, 1637, __pyx_L1_error)
+  if (__Pyx_SetVtable(__pyx_type_19dependency_injector_9providers_Factory.tp_dict, __pyx_vtabptr_19dependency_injector_9providers_Factory) < 0) __PYX_ERR(1, 1652, __pyx_L1_error)
+  if (PyObject_SetAttr(__pyx_m, __pyx_n_s_Factory, (PyObject *)&__pyx_type_19dependency_injector_9providers_Factory) < 0) __PYX_ERR(1, 1652, __pyx_L1_error)
+  if (__Pyx_setup_reduce((PyObject*)&__pyx_type_19dependency_injector_9providers_Factory) < 0) __PYX_ERR(1, 1652, __pyx_L1_error)
   __pyx_ptype_19dependency_injector_9providers_Factory = &__pyx_type_19dependency_injector_9providers_Factory;
   __pyx_vtabptr_19dependency_injector_9providers_DelegatedFactory = &__pyx_vtable_19dependency_injector_9providers_DelegatedFactory;
   __pyx_vtable_19dependency_injector_9providers_DelegatedFactory.__pyx_base = *__pyx_vtabptr_19dependency_injector_9providers_Factory;
   __pyx_type_19dependency_injector_9providers_DelegatedFactory.tp_base = __pyx_ptype_19dependency_injector_9providers_Factory;
-  if (PyType_Ready(&__pyx_type_19dependency_injector_9providers_DelegatedFactory) < 0) __PYX_ERR(1, 1854, __pyx_L1_error)
+  if (PyType_Ready(&__pyx_type_19dependency_injector_9providers_DelegatedFactory) < 0) __PYX_ERR(1, 1869, __pyx_L1_error)
   #if PY_VERSION_HEX < 0x030800B1
   __pyx_type_19dependency_injector_9providers_DelegatedFactory.tp_print = 0;
   #endif
   if ((CYTHON_USE_TYPE_SLOTS && CYTHON_USE_PYTYPE_LOOKUP) && likely(!__pyx_type_19dependency_injector_9providers_DelegatedFactory.tp_dictoffset && __pyx_type_19dependency_injector_9providers_DelegatedFactory.tp_getattro == PyObject_GenericGetAttr)) {
     __pyx_type_19dependency_injector_9providers_DelegatedFactory.tp_getattro = __Pyx_PyObject_GenericGetAttr;
   }
-  if (__Pyx_SetVtable(__pyx_type_19dependency_injector_9providers_DelegatedFactory.tp_dict, __pyx_vtabptr_19dependency_injector_9providers_DelegatedFactory) < 0) __PYX_ERR(1, 1854, __pyx_L1_error)
-  if (PyObject_SetAttr(__pyx_m, __pyx_n_s_DelegatedFactory, (PyObject *)&__pyx_type_19dependency_injector_9providers_DelegatedFactory) < 0) __PYX_ERR(1, 1854, __pyx_L1_error)
-  if (__Pyx_setup_reduce((PyObject*)&__pyx_type_19dependency_injector_9providers_DelegatedFactory) < 0) __PYX_ERR(1, 1854, __pyx_L1_error)
+  if (__Pyx_SetVtable(__pyx_type_19dependency_injector_9providers_DelegatedFactory.tp_dict, __pyx_vtabptr_19dependency_injector_9providers_DelegatedFactory) < 0) __PYX_ERR(1, 1869, __pyx_L1_error)
+  if (PyObject_SetAttr(__pyx_m, __pyx_n_s_DelegatedFactory, (PyObject *)&__pyx_type_19dependency_injector_9providers_DelegatedFactory) < 0) __PYX_ERR(1, 1869, __pyx_L1_error)
+  if (__Pyx_setup_reduce((PyObject*)&__pyx_type_19dependency_injector_9providers_DelegatedFactory) < 0) __PYX_ERR(1, 1869, __pyx_L1_error)
   __pyx_ptype_19dependency_injector_9providers_DelegatedFactory = &__pyx_type_19dependency_injector_9providers_DelegatedFactory;
   __pyx_vtabptr_19dependency_injector_9providers_AbstractFactory = &__pyx_vtable_19dependency_injector_9providers_AbstractFactory;
   __pyx_vtable_19dependency_injector_9providers_AbstractFactory.__pyx_base = *__pyx_vtabptr_19dependency_injector_9providers_Factory;
   __pyx_vtable_19dependency_injector_9providers_AbstractFactory.__pyx_base.__pyx_base._provide = (PyObject *(*)(struct __pyx_obj_19dependency_injector_9providers_Provider *, PyObject *, PyObject *, int __pyx_skip_dispatch))__pyx_f_19dependency_injector_9providers_15AbstractFactory__provide;
   __pyx_type_19dependency_injector_9providers_AbstractFactory.tp_base = __pyx_ptype_19dependency_injector_9providers_Factory;
-  if (PyType_Ready(&__pyx_type_19dependency_injector_9providers_AbstractFactory) < 0) __PYX_ERR(1, 1876, __pyx_L1_error)
+  if (PyType_Ready(&__pyx_type_19dependency_injector_9providers_AbstractFactory) < 0) __PYX_ERR(1, 1891, __pyx_L1_error)
   #if PY_VERSION_HEX < 0x030800B1
   __pyx_type_19dependency_injector_9providers_AbstractFactory.tp_print = 0;
   #endif
@@ -103179,7 +103693,7 @@ static int __Pyx_modinit_type_init_code(void) {
   }
   #if CYTHON_COMPILING_IN_CPYTHON
   {
-    PyObject *wrapper = PyObject_GetAttrString((PyObject *)&__pyx_type_19dependency_injector_9providers_AbstractFactory, "__call__"); if (unlikely(!wrapper)) __PYX_ERR(1, 1876, __pyx_L1_error)
+    PyObject *wrapper = PyObject_GetAttrString((PyObject *)&__pyx_type_19dependency_injector_9providers_AbstractFactory, "__call__"); if (unlikely(!wrapper)) __PYX_ERR(1, 1891, __pyx_L1_error)
     if (Py_TYPE(wrapper) == &PyWrapperDescr_Type) {
       __pyx_wrapperbase_19dependency_injector_9providers_15AbstractFactory___call__ = *((PyWrapperDescrObject *)wrapper)->d_base;
       __pyx_wrapperbase_19dependency_injector_9providers_15AbstractFactory___call__.doc = __pyx_doc_19dependency_injector_9providers_15AbstractFactory___call__;
@@ -103187,14 +103701,14 @@ static int __Pyx_modinit_type_init_code(void) {
     }
   }
   #endif
-  if (__Pyx_SetVtable(__pyx_type_19dependency_injector_9providers_AbstractFactory.tp_dict, __pyx_vtabptr_19dependency_injector_9providers_AbstractFactory) < 0) __PYX_ERR(1, 1876, __pyx_L1_error)
-  if (PyObject_SetAttr(__pyx_m, __pyx_n_s_AbstractFactory, (PyObject *)&__pyx_type_19dependency_injector_9providers_AbstractFactory) < 0) __PYX_ERR(1, 1876, __pyx_L1_error)
-  if (__Pyx_setup_reduce((PyObject*)&__pyx_type_19dependency_injector_9providers_AbstractFactory) < 0) __PYX_ERR(1, 1876, __pyx_L1_error)
+  if (__Pyx_SetVtable(__pyx_type_19dependency_injector_9providers_AbstractFactory.tp_dict, __pyx_vtabptr_19dependency_injector_9providers_AbstractFactory) < 0) __PYX_ERR(1, 1891, __pyx_L1_error)
+  if (PyObject_SetAttr(__pyx_m, __pyx_n_s_AbstractFactory, (PyObject *)&__pyx_type_19dependency_injector_9providers_AbstractFactory) < 0) __PYX_ERR(1, 1891, __pyx_L1_error)
+  if (__Pyx_setup_reduce((PyObject*)&__pyx_type_19dependency_injector_9providers_AbstractFactory) < 0) __PYX_ERR(1, 1891, __pyx_L1_error)
   __pyx_ptype_19dependency_injector_9providers_AbstractFactory = &__pyx_type_19dependency_injector_9providers_AbstractFactory;
   __pyx_vtabptr_19dependency_injector_9providers_FactoryDelegate = &__pyx_vtable_19dependency_injector_9providers_FactoryDelegate;
   __pyx_vtable_19dependency_injector_9providers_FactoryDelegate.__pyx_base = *__pyx_vtabptr_19dependency_injector_9providers_Delegate;
   __pyx_type_19dependency_injector_9providers_FactoryDelegate.tp_base = __pyx_ptype_19dependency_injector_9providers_Delegate;
-  if (PyType_Ready(&__pyx_type_19dependency_injector_9providers_FactoryDelegate) < 0) __PYX_ERR(1, 1917, __pyx_L1_error)
+  if (PyType_Ready(&__pyx_type_19dependency_injector_9providers_FactoryDelegate) < 0) __PYX_ERR(1, 1932, __pyx_L1_error)
   #if PY_VERSION_HEX < 0x030800B1
   __pyx_type_19dependency_injector_9providers_FactoryDelegate.tp_print = 0;
   #endif
@@ -103203,7 +103717,7 @@ static int __Pyx_modinit_type_init_code(void) {
   }
   #if CYTHON_COMPILING_IN_CPYTHON
   {
-    PyObject *wrapper = PyObject_GetAttrString((PyObject *)&__pyx_type_19dependency_injector_9providers_FactoryDelegate, "__init__"); if (unlikely(!wrapper)) __PYX_ERR(1, 1917, __pyx_L1_error)
+    PyObject *wrapper = PyObject_GetAttrString((PyObject *)&__pyx_type_19dependency_injector_9providers_FactoryDelegate, "__init__"); if (unlikely(!wrapper)) __PYX_ERR(1, 1932, __pyx_L1_error)
     if (Py_TYPE(wrapper) == &PyWrapperDescr_Type) {
       __pyx_wrapperbase_19dependency_injector_9providers_15FactoryDelegate___init__ = *((PyWrapperDescrObject *)wrapper)->d_base;
       __pyx_wrapperbase_19dependency_injector_9providers_15FactoryDelegate___init__.doc = __pyx_doc_19dependency_injector_9providers_15FactoryDelegate___init__;
@@ -103211,22 +103725,22 @@ static int __Pyx_modinit_type_init_code(void) {
     }
   }
   #endif
-  if (__Pyx_SetVtable(__pyx_type_19dependency_injector_9providers_FactoryDelegate.tp_dict, __pyx_vtabptr_19dependency_injector_9providers_FactoryDelegate) < 0) __PYX_ERR(1, 1917, __pyx_L1_error)
-  if (PyObject_SetAttr(__pyx_m, __pyx_n_s_FactoryDelegate, (PyObject *)&__pyx_type_19dependency_injector_9providers_FactoryDelegate) < 0) __PYX_ERR(1, 1917, __pyx_L1_error)
-  if (__Pyx_setup_reduce((PyObject*)&__pyx_type_19dependency_injector_9providers_FactoryDelegate) < 0) __PYX_ERR(1, 1917, __pyx_L1_error)
+  if (__Pyx_SetVtable(__pyx_type_19dependency_injector_9providers_FactoryDelegate.tp_dict, __pyx_vtabptr_19dependency_injector_9providers_FactoryDelegate) < 0) __PYX_ERR(1, 1932, __pyx_L1_error)
+  if (PyObject_SetAttr(__pyx_m, __pyx_n_s_FactoryDelegate, (PyObject *)&__pyx_type_19dependency_injector_9providers_FactoryDelegate) < 0) __PYX_ERR(1, 1932, __pyx_L1_error)
+  if (__Pyx_setup_reduce((PyObject*)&__pyx_type_19dependency_injector_9providers_FactoryDelegate) < 0) __PYX_ERR(1, 1932, __pyx_L1_error)
   __pyx_ptype_19dependency_injector_9providers_FactoryDelegate = &__pyx_type_19dependency_injector_9providers_FactoryDelegate;
   __pyx_vtabptr_19dependency_injector_9providers_FactoryAggregate = &__pyx_vtable_19dependency_injector_9providers_FactoryAggregate;
   __pyx_vtable_19dependency_injector_9providers_FactoryAggregate.__pyx_base = *__pyx_vtabptr_19dependency_injector_9providers_Provider;
   __pyx_vtable_19dependency_injector_9providers_FactoryAggregate.__pyx_base._provide = (PyObject *(*)(struct __pyx_obj_19dependency_injector_9providers_Provider *, PyObject *, PyObject *, int __pyx_skip_dispatch))__pyx_f_19dependency_injector_9providers_16FactoryAggregate__provide;
   __pyx_vtable_19dependency_injector_9providers_FactoryAggregate.__pyx___get_factory = (struct __pyx_obj_19dependency_injector_9providers_Factory *(*)(struct __pyx_obj_19dependency_injector_9providers_FactoryAggregate *, PyObject *))__pyx_f_19dependency_injector_9providers_16FactoryAggregate___get_factory;
   __pyx_type_19dependency_injector_9providers_FactoryAggregate.tp_base = __pyx_ptype_19dependency_injector_9providers_Provider;
-  if (PyType_Ready(&__pyx_type_19dependency_injector_9providers_FactoryAggregate) < 0) __PYX_ERR(1, 1939, __pyx_L1_error)
+  if (PyType_Ready(&__pyx_type_19dependency_injector_9providers_FactoryAggregate) < 0) __PYX_ERR(1, 1954, __pyx_L1_error)
   #if PY_VERSION_HEX < 0x030800B1
   __pyx_type_19dependency_injector_9providers_FactoryAggregate.tp_print = 0;
   #endif
   #if CYTHON_COMPILING_IN_CPYTHON
   {
-    PyObject *wrapper = PyObject_GetAttrString((PyObject *)&__pyx_type_19dependency_injector_9providers_FactoryAggregate, "__init__"); if (unlikely(!wrapper)) __PYX_ERR(1, 1939, __pyx_L1_error)
+    PyObject *wrapper = PyObject_GetAttrString((PyObject *)&__pyx_type_19dependency_injector_9providers_FactoryAggregate, "__init__"); if (unlikely(!wrapper)) __PYX_ERR(1, 1954, __pyx_L1_error)
     if (Py_TYPE(wrapper) == &PyWrapperDescr_Type) {
       __pyx_wrapperbase_19dependency_injector_9providers_16FactoryAggregate___init__ = *((PyWrapperDescrObject *)wrapper)->d_base;
       __pyx_wrapperbase_19dependency_injector_9providers_16FactoryAggregate___init__.doc = __pyx_doc_19dependency_injector_9providers_16FactoryAggregate___init__;
@@ -103236,7 +103750,7 @@ static int __Pyx_modinit_type_init_code(void) {
   #endif
   #if CYTHON_COMPILING_IN_CPYTHON
   {
-    PyObject *wrapper = PyObject_GetAttrString((PyObject *)&__pyx_type_19dependency_injector_9providers_FactoryAggregate, "__getattr__"); if (unlikely(!wrapper)) __PYX_ERR(1, 1939, __pyx_L1_error)
+    PyObject *wrapper = PyObject_GetAttrString((PyObject *)&__pyx_type_19dependency_injector_9providers_FactoryAggregate, "__getattr__"); if (unlikely(!wrapper)) __PYX_ERR(1, 1954, __pyx_L1_error)
     if (Py_TYPE(wrapper) == &PyWrapperDescr_Type) {
       __pyx_wrapperbase_19dependency_injector_9providers_16FactoryAggregate_4__getattr__ = *((PyWrapperDescrObject *)wrapper)->d_base;
       __pyx_wrapperbase_19dependency_injector_9providers_16FactoryAggregate_4__getattr__.doc = __pyx_doc_19dependency_injector_9providers_16FactoryAggregate_4__getattr__;
@@ -103246,7 +103760,7 @@ static int __Pyx_modinit_type_init_code(void) {
   #endif
   #if CYTHON_COMPILING_IN_CPYTHON
   {
-    PyObject *wrapper = PyObject_GetAttrString((PyObject *)&__pyx_type_19dependency_injector_9providers_FactoryAggregate, "__str__"); if (unlikely(!wrapper)) __PYX_ERR(1, 1939, __pyx_L1_error)
+    PyObject *wrapper = PyObject_GetAttrString((PyObject *)&__pyx_type_19dependency_injector_9providers_FactoryAggregate, "__str__"); if (unlikely(!wrapper)) __PYX_ERR(1, 1954, __pyx_L1_error)
     if (Py_TYPE(wrapper) == &PyWrapperDescr_Type) {
       __pyx_wrapperbase_19dependency_injector_9providers_16FactoryAggregate_6__str__ = *((PyWrapperDescrObject *)wrapper)->d_base;
       __pyx_wrapperbase_19dependency_injector_9providers_16FactoryAggregate_6__str__.doc = __pyx_doc_19dependency_injector_9providers_16FactoryAggregate_6__str__;
@@ -103254,14 +103768,14 @@ static int __Pyx_modinit_type_init_code(void) {
     }
   }
   #endif
-  if (__Pyx_SetVtable(__pyx_type_19dependency_injector_9providers_FactoryAggregate.tp_dict, __pyx_vtabptr_19dependency_injector_9providers_FactoryAggregate) < 0) __PYX_ERR(1, 1939, __pyx_L1_error)
-  if (PyObject_SetAttr(__pyx_m, __pyx_n_s_FactoryAggregate, (PyObject *)&__pyx_type_19dependency_injector_9providers_FactoryAggregate) < 0) __PYX_ERR(1, 1939, __pyx_L1_error)
-  if (__Pyx_setup_reduce((PyObject*)&__pyx_type_19dependency_injector_9providers_FactoryAggregate) < 0) __PYX_ERR(1, 1939, __pyx_L1_error)
+  if (__Pyx_SetVtable(__pyx_type_19dependency_injector_9providers_FactoryAggregate.tp_dict, __pyx_vtabptr_19dependency_injector_9providers_FactoryAggregate) < 0) __PYX_ERR(1, 1954, __pyx_L1_error)
+  if (PyObject_SetAttr(__pyx_m, __pyx_n_s_FactoryAggregate, (PyObject *)&__pyx_type_19dependency_injector_9providers_FactoryAggregate) < 0) __PYX_ERR(1, 1954, __pyx_L1_error)
+  if (__Pyx_setup_reduce((PyObject*)&__pyx_type_19dependency_injector_9providers_FactoryAggregate) < 0) __PYX_ERR(1, 1954, __pyx_L1_error)
   __pyx_ptype_19dependency_injector_9providers_FactoryAggregate = &__pyx_type_19dependency_injector_9providers_FactoryAggregate;
   __pyx_vtabptr_19dependency_injector_9providers_BaseSingleton = &__pyx_vtable_19dependency_injector_9providers_BaseSingleton;
   __pyx_vtable_19dependency_injector_9providers_BaseSingleton.__pyx_base = *__pyx_vtabptr_19dependency_injector_9providers_Provider;
   __pyx_type_19dependency_injector_9providers_BaseSingleton.tp_base = __pyx_ptype_19dependency_injector_9providers_Provider;
-  if (PyType_Ready(&__pyx_type_19dependency_injector_9providers_BaseSingleton) < 0) __PYX_ERR(1, 2032, __pyx_L1_error)
+  if (PyType_Ready(&__pyx_type_19dependency_injector_9providers_BaseSingleton) < 0) __PYX_ERR(1, 2047, __pyx_L1_error)
   #if PY_VERSION_HEX < 0x030800B1
   __pyx_type_19dependency_injector_9providers_BaseSingleton.tp_print = 0;
   #endif
@@ -103270,7 +103784,7 @@ static int __Pyx_modinit_type_init_code(void) {
   }
   #if CYTHON_COMPILING_IN_CPYTHON
   {
-    PyObject *wrapper = PyObject_GetAttrString((PyObject *)&__pyx_type_19dependency_injector_9providers_BaseSingleton, "__init__"); if (unlikely(!wrapper)) __PYX_ERR(1, 2032, __pyx_L1_error)
+    PyObject *wrapper = PyObject_GetAttrString((PyObject *)&__pyx_type_19dependency_injector_9providers_BaseSingleton, "__init__"); if (unlikely(!wrapper)) __PYX_ERR(1, 2047, __pyx_L1_error)
     if (Py_TYPE(wrapper) == &PyWrapperDescr_Type) {
       __pyx_wrapperbase_19dependency_injector_9providers_13BaseSingleton___init__ = *((PyWrapperDescrObject *)wrapper)->d_base;
       __pyx_wrapperbase_19dependency_injector_9providers_13BaseSingleton___init__.doc = __pyx_doc_19dependency_injector_9providers_13BaseSingleton___init__;
@@ -103280,7 +103794,7 @@ static int __Pyx_modinit_type_init_code(void) {
   #endif
   #if CYTHON_COMPILING_IN_CPYTHON
   {
-    PyObject *wrapper = PyObject_GetAttrString((PyObject *)&__pyx_type_19dependency_injector_9providers_BaseSingleton, "__str__"); if (unlikely(!wrapper)) __PYX_ERR(1, 2032, __pyx_L1_error)
+    PyObject *wrapper = PyObject_GetAttrString((PyObject *)&__pyx_type_19dependency_injector_9providers_BaseSingleton, "__str__"); if (unlikely(!wrapper)) __PYX_ERR(1, 2047, __pyx_L1_error)
     if (Py_TYPE(wrapper) == &PyWrapperDescr_Type) {
       __pyx_wrapperbase_19dependency_injector_9providers_13BaseSingleton_2__str__ = *((PyWrapperDescrObject *)wrapper)->d_base;
       __pyx_wrapperbase_19dependency_injector_9providers_13BaseSingleton_2__str__.doc = __pyx_doc_19dependency_injector_9providers_13BaseSingleton_2__str__;
@@ -103288,15 +103802,15 @@ static int __Pyx_modinit_type_init_code(void) {
     }
   }
   #endif
-  if (__Pyx_SetVtable(__pyx_type_19dependency_injector_9providers_BaseSingleton.tp_dict, __pyx_vtabptr_19dependency_injector_9providers_BaseSingleton) < 0) __PYX_ERR(1, 2032, __pyx_L1_error)
-  if (PyObject_SetAttr(__pyx_m, __pyx_n_s_BaseSingleton, (PyObject *)&__pyx_type_19dependency_injector_9providers_BaseSingleton) < 0) __PYX_ERR(1, 2032, __pyx_L1_error)
-  if (__Pyx_setup_reduce((PyObject*)&__pyx_type_19dependency_injector_9providers_BaseSingleton) < 0) __PYX_ERR(1, 2032, __pyx_L1_error)
+  if (__Pyx_SetVtable(__pyx_type_19dependency_injector_9providers_BaseSingleton.tp_dict, __pyx_vtabptr_19dependency_injector_9providers_BaseSingleton) < 0) __PYX_ERR(1, 2047, __pyx_L1_error)
+  if (PyObject_SetAttr(__pyx_m, __pyx_n_s_BaseSingleton, (PyObject *)&__pyx_type_19dependency_injector_9providers_BaseSingleton) < 0) __PYX_ERR(1, 2047, __pyx_L1_error)
+  if (__Pyx_setup_reduce((PyObject*)&__pyx_type_19dependency_injector_9providers_BaseSingleton) < 0) __PYX_ERR(1, 2047, __pyx_L1_error)
   __pyx_ptype_19dependency_injector_9providers_BaseSingleton = &__pyx_type_19dependency_injector_9providers_BaseSingleton;
   __pyx_vtabptr_19dependency_injector_9providers_Singleton = &__pyx_vtable_19dependency_injector_9providers_Singleton;
   __pyx_vtable_19dependency_injector_9providers_Singleton.__pyx_base = *__pyx_vtabptr_19dependency_injector_9providers_BaseSingleton;
   __pyx_vtable_19dependency_injector_9providers_Singleton.__pyx_base.__pyx_base._provide = (PyObject *(*)(struct __pyx_obj_19dependency_injector_9providers_Provider *, PyObject *, PyObject *, int __pyx_skip_dispatch))__pyx_f_19dependency_injector_9providers_9Singleton__provide;
   __pyx_type_19dependency_injector_9providers_Singleton.tp_base = __pyx_ptype_19dependency_injector_9providers_BaseSingleton;
-  if (PyType_Ready(&__pyx_type_19dependency_injector_9providers_Singleton) < 0) __PYX_ERR(1, 2195, __pyx_L1_error)
+  if (PyType_Ready(&__pyx_type_19dependency_injector_9providers_Singleton) < 0) __PYX_ERR(1, 2210, __pyx_L1_error)
   #if PY_VERSION_HEX < 0x030800B1
   __pyx_type_19dependency_injector_9providers_Singleton.tp_print = 0;
   #endif
@@ -103305,7 +103819,7 @@ static int __Pyx_modinit_type_init_code(void) {
   }
   #if CYTHON_COMPILING_IN_CPYTHON
   {
-    PyObject *wrapper = PyObject_GetAttrString((PyObject *)&__pyx_type_19dependency_injector_9providers_Singleton, "__init__"); if (unlikely(!wrapper)) __PYX_ERR(1, 2195, __pyx_L1_error)
+    PyObject *wrapper = PyObject_GetAttrString((PyObject *)&__pyx_type_19dependency_injector_9providers_Singleton, "__init__"); if (unlikely(!wrapper)) __PYX_ERR(1, 2210, __pyx_L1_error)
     if (Py_TYPE(wrapper) == &PyWrapperDescr_Type) {
       __pyx_wrapperbase_19dependency_injector_9providers_9Singleton___init__ = *((PyWrapperDescrObject *)wrapper)->d_base;
       __pyx_wrapperbase_19dependency_injector_9providers_9Singleton___init__.doc = __pyx_doc_19dependency_injector_9providers_9Singleton___init__;
@@ -103313,29 +103827,29 @@ static int __Pyx_modinit_type_init_code(void) {
     }
   }
   #endif
-  if (__Pyx_SetVtable(__pyx_type_19dependency_injector_9providers_Singleton.tp_dict, __pyx_vtabptr_19dependency_injector_9providers_Singleton) < 0) __PYX_ERR(1, 2195, __pyx_L1_error)
-  if (PyObject_SetAttr(__pyx_m, __pyx_n_s_Singleton, (PyObject *)&__pyx_type_19dependency_injector_9providers_Singleton) < 0) __PYX_ERR(1, 2195, __pyx_L1_error)
-  if (__Pyx_setup_reduce((PyObject*)&__pyx_type_19dependency_injector_9providers_Singleton) < 0) __PYX_ERR(1, 2195, __pyx_L1_error)
+  if (__Pyx_SetVtable(__pyx_type_19dependency_injector_9providers_Singleton.tp_dict, __pyx_vtabptr_19dependency_injector_9providers_Singleton) < 0) __PYX_ERR(1, 2210, __pyx_L1_error)
+  if (PyObject_SetAttr(__pyx_m, __pyx_n_s_Singleton, (PyObject *)&__pyx_type_19dependency_injector_9providers_Singleton) < 0) __PYX_ERR(1, 2210, __pyx_L1_error)
+  if (__Pyx_setup_reduce((PyObject*)&__pyx_type_19dependency_injector_9providers_Singleton) < 0) __PYX_ERR(1, 2210, __pyx_L1_error)
   __pyx_ptype_19dependency_injector_9providers_Singleton = &__pyx_type_19dependency_injector_9providers_Singleton;
   __pyx_vtabptr_19dependency_injector_9providers_DelegatedSingleton = &__pyx_vtable_19dependency_injector_9providers_DelegatedSingleton;
   __pyx_vtable_19dependency_injector_9providers_DelegatedSingleton.__pyx_base = *__pyx_vtabptr_19dependency_injector_9providers_Singleton;
   __pyx_type_19dependency_injector_9providers_DelegatedSingleton.tp_base = __pyx_ptype_19dependency_injector_9providers_Singleton;
-  if (PyType_Ready(&__pyx_type_19dependency_injector_9providers_DelegatedSingleton) < 0) __PYX_ERR(1, 2262, __pyx_L1_error)
+  if (PyType_Ready(&__pyx_type_19dependency_injector_9providers_DelegatedSingleton) < 0) __PYX_ERR(1, 2277, __pyx_L1_error)
   #if PY_VERSION_HEX < 0x030800B1
   __pyx_type_19dependency_injector_9providers_DelegatedSingleton.tp_print = 0;
   #endif
   if ((CYTHON_USE_TYPE_SLOTS && CYTHON_USE_PYTYPE_LOOKUP) && likely(!__pyx_type_19dependency_injector_9providers_DelegatedSingleton.tp_dictoffset && __pyx_type_19dependency_injector_9providers_DelegatedSingleton.tp_getattro == PyObject_GenericGetAttr)) {
     __pyx_type_19dependency_injector_9providers_DelegatedSingleton.tp_getattro = __Pyx_PyObject_GenericGetAttr;
   }
-  if (__Pyx_SetVtable(__pyx_type_19dependency_injector_9providers_DelegatedSingleton.tp_dict, __pyx_vtabptr_19dependency_injector_9providers_DelegatedSingleton) < 0) __PYX_ERR(1, 2262, __pyx_L1_error)
-  if (PyObject_SetAttr(__pyx_m, __pyx_n_s_DelegatedSingleton, (PyObject *)&__pyx_type_19dependency_injector_9providers_DelegatedSingleton) < 0) __PYX_ERR(1, 2262, __pyx_L1_error)
-  if (__Pyx_setup_reduce((PyObject*)&__pyx_type_19dependency_injector_9providers_DelegatedSingleton) < 0) __PYX_ERR(1, 2262, __pyx_L1_error)
+  if (__Pyx_SetVtable(__pyx_type_19dependency_injector_9providers_DelegatedSingleton.tp_dict, __pyx_vtabptr_19dependency_injector_9providers_DelegatedSingleton) < 0) __PYX_ERR(1, 2277, __pyx_L1_error)
+  if (PyObject_SetAttr(__pyx_m, __pyx_n_s_DelegatedSingleton, (PyObject *)&__pyx_type_19dependency_injector_9providers_DelegatedSingleton) < 0) __PYX_ERR(1, 2277, __pyx_L1_error)
+  if (__Pyx_setup_reduce((PyObject*)&__pyx_type_19dependency_injector_9providers_DelegatedSingleton) < 0) __PYX_ERR(1, 2277, __pyx_L1_error)
   __pyx_ptype_19dependency_injector_9providers_DelegatedSingleton = &__pyx_type_19dependency_injector_9providers_DelegatedSingleton;
   __pyx_vtabptr_19dependency_injector_9providers_ThreadSafeSingleton = &__pyx_vtable_19dependency_injector_9providers_ThreadSafeSingleton;
   __pyx_vtable_19dependency_injector_9providers_ThreadSafeSingleton.__pyx_base = *__pyx_vtabptr_19dependency_injector_9providers_BaseSingleton;
   __pyx_vtable_19dependency_injector_9providers_ThreadSafeSingleton.__pyx_base.__pyx_base._provide = (PyObject *(*)(struct __pyx_obj_19dependency_injector_9providers_Provider *, PyObject *, PyObject *, int __pyx_skip_dispatch))__pyx_f_19dependency_injector_9providers_19ThreadSafeSingleton__provide;
   __pyx_type_19dependency_injector_9providers_ThreadSafeSingleton.tp_base = __pyx_ptype_19dependency_injector_9providers_BaseSingleton;
-  if (PyType_Ready(&__pyx_type_19dependency_injector_9providers_ThreadSafeSingleton) < 0) __PYX_ERR(1, 2284, __pyx_L1_error)
+  if (PyType_Ready(&__pyx_type_19dependency_injector_9providers_ThreadSafeSingleton) < 0) __PYX_ERR(1, 2299, __pyx_L1_error)
   #if PY_VERSION_HEX < 0x030800B1
   __pyx_type_19dependency_injector_9providers_ThreadSafeSingleton.tp_print = 0;
   #endif
@@ -103344,7 +103858,7 @@ static int __Pyx_modinit_type_init_code(void) {
   }
   #if CYTHON_COMPILING_IN_CPYTHON
   {
-    PyObject *wrapper = PyObject_GetAttrString((PyObject *)&__pyx_type_19dependency_injector_9providers_ThreadSafeSingleton, "__init__"); if (unlikely(!wrapper)) __PYX_ERR(1, 2284, __pyx_L1_error)
+    PyObject *wrapper = PyObject_GetAttrString((PyObject *)&__pyx_type_19dependency_injector_9providers_ThreadSafeSingleton, "__init__"); if (unlikely(!wrapper)) __PYX_ERR(1, 2299, __pyx_L1_error)
     if (Py_TYPE(wrapper) == &PyWrapperDescr_Type) {
       __pyx_wrapperbase_19dependency_injector_9providers_19ThreadSafeSingleton___init__ = *((PyWrapperDescrObject *)wrapper)->d_base;
       __pyx_wrapperbase_19dependency_injector_9providers_19ThreadSafeSingleton___init__.doc = __pyx_doc_19dependency_injector_9providers_19ThreadSafeSingleton___init__;
@@ -103352,29 +103866,29 @@ static int __Pyx_modinit_type_init_code(void) {
     }
   }
   #endif
-  if (__Pyx_SetVtable(__pyx_type_19dependency_injector_9providers_ThreadSafeSingleton.tp_dict, __pyx_vtabptr_19dependency_injector_9providers_ThreadSafeSingleton) < 0) __PYX_ERR(1, 2284, __pyx_L1_error)
-  if (PyObject_SetAttr(__pyx_m, __pyx_n_s_ThreadSafeSingleton, (PyObject *)&__pyx_type_19dependency_injector_9providers_ThreadSafeSingleton) < 0) __PYX_ERR(1, 2284, __pyx_L1_error)
-  if (__Pyx_setup_reduce((PyObject*)&__pyx_type_19dependency_injector_9providers_ThreadSafeSingleton) < 0) __PYX_ERR(1, 2284, __pyx_L1_error)
+  if (__Pyx_SetVtable(__pyx_type_19dependency_injector_9providers_ThreadSafeSingleton.tp_dict, __pyx_vtabptr_19dependency_injector_9providers_ThreadSafeSingleton) < 0) __PYX_ERR(1, 2299, __pyx_L1_error)
+  if (PyObject_SetAttr(__pyx_m, __pyx_n_s_ThreadSafeSingleton, (PyObject *)&__pyx_type_19dependency_injector_9providers_ThreadSafeSingleton) < 0) __PYX_ERR(1, 2299, __pyx_L1_error)
+  if (__Pyx_setup_reduce((PyObject*)&__pyx_type_19dependency_injector_9providers_ThreadSafeSingleton) < 0) __PYX_ERR(1, 2299, __pyx_L1_error)
   __pyx_ptype_19dependency_injector_9providers_ThreadSafeSingleton = &__pyx_type_19dependency_injector_9providers_ThreadSafeSingleton;
   __pyx_vtabptr_19dependency_injector_9providers_DelegatedThreadSafeSingleton = &__pyx_vtable_19dependency_injector_9providers_DelegatedThreadSafeSingleton;
   __pyx_vtable_19dependency_injector_9providers_DelegatedThreadSafeSingleton.__pyx_base = *__pyx_vtabptr_19dependency_injector_9providers_ThreadSafeSingleton;
   __pyx_type_19dependency_injector_9providers_DelegatedThreadSafeSingleton.tp_base = __pyx_ptype_19dependency_injector_9providers_ThreadSafeSingleton;
-  if (PyType_Ready(&__pyx_type_19dependency_injector_9providers_DelegatedThreadSafeSingleton) < 0) __PYX_ERR(1, 2335, __pyx_L1_error)
+  if (PyType_Ready(&__pyx_type_19dependency_injector_9providers_DelegatedThreadSafeSingleton) < 0) __PYX_ERR(1, 2350, __pyx_L1_error)
   #if PY_VERSION_HEX < 0x030800B1
   __pyx_type_19dependency_injector_9providers_DelegatedThreadSafeSingleton.tp_print = 0;
   #endif
   if ((CYTHON_USE_TYPE_SLOTS && CYTHON_USE_PYTYPE_LOOKUP) && likely(!__pyx_type_19dependency_injector_9providers_DelegatedThreadSafeSingleton.tp_dictoffset && __pyx_type_19dependency_injector_9providers_DelegatedThreadSafeSingleton.tp_getattro == PyObject_GenericGetAttr)) {
     __pyx_type_19dependency_injector_9providers_DelegatedThreadSafeSingleton.tp_getattro = __Pyx_PyObject_GenericGetAttr;
   }
-  if (__Pyx_SetVtable(__pyx_type_19dependency_injector_9providers_DelegatedThreadSafeSingleton.tp_dict, __pyx_vtabptr_19dependency_injector_9providers_DelegatedThreadSafeSingleton) < 0) __PYX_ERR(1, 2335, __pyx_L1_error)
-  if (PyObject_SetAttr(__pyx_m, __pyx_n_s_DelegatedThreadSafeSingleton, (PyObject *)&__pyx_type_19dependency_injector_9providers_DelegatedThreadSafeSingleton) < 0) __PYX_ERR(1, 2335, __pyx_L1_error)
-  if (__Pyx_setup_reduce((PyObject*)&__pyx_type_19dependency_injector_9providers_DelegatedThreadSafeSingleton) < 0) __PYX_ERR(1, 2335, __pyx_L1_error)
+  if (__Pyx_SetVtable(__pyx_type_19dependency_injector_9providers_DelegatedThreadSafeSingleton.tp_dict, __pyx_vtabptr_19dependency_injector_9providers_DelegatedThreadSafeSingleton) < 0) __PYX_ERR(1, 2350, __pyx_L1_error)
+  if (PyObject_SetAttr(__pyx_m, __pyx_n_s_DelegatedThreadSafeSingleton, (PyObject *)&__pyx_type_19dependency_injector_9providers_DelegatedThreadSafeSingleton) < 0) __PYX_ERR(1, 2350, __pyx_L1_error)
+  if (__Pyx_setup_reduce((PyObject*)&__pyx_type_19dependency_injector_9providers_DelegatedThreadSafeSingleton) < 0) __PYX_ERR(1, 2350, __pyx_L1_error)
   __pyx_ptype_19dependency_injector_9providers_DelegatedThreadSafeSingleton = &__pyx_type_19dependency_injector_9providers_DelegatedThreadSafeSingleton;
   __pyx_vtabptr_19dependency_injector_9providers_ThreadLocalSingleton = &__pyx_vtable_19dependency_injector_9providers_ThreadLocalSingleton;
   __pyx_vtable_19dependency_injector_9providers_ThreadLocalSingleton.__pyx_base = *__pyx_vtabptr_19dependency_injector_9providers_BaseSingleton;
   __pyx_vtable_19dependency_injector_9providers_ThreadLocalSingleton.__pyx_base.__pyx_base._provide = (PyObject *(*)(struct __pyx_obj_19dependency_injector_9providers_Provider *, PyObject *, PyObject *, int __pyx_skip_dispatch))__pyx_f_19dependency_injector_9providers_20ThreadLocalSingleton__provide;
   __pyx_type_19dependency_injector_9providers_ThreadLocalSingleton.tp_base = __pyx_ptype_19dependency_injector_9providers_BaseSingleton;
-  if (PyType_Ready(&__pyx_type_19dependency_injector_9providers_ThreadLocalSingleton) < 0) __PYX_ERR(1, 2357, __pyx_L1_error)
+  if (PyType_Ready(&__pyx_type_19dependency_injector_9providers_ThreadLocalSingleton) < 0) __PYX_ERR(1, 2372, __pyx_L1_error)
   #if PY_VERSION_HEX < 0x030800B1
   __pyx_type_19dependency_injector_9providers_ThreadLocalSingleton.tp_print = 0;
   #endif
@@ -103383,7 +103897,7 @@ static int __Pyx_modinit_type_init_code(void) {
   }
   #if CYTHON_COMPILING_IN_CPYTHON
   {
-    PyObject *wrapper = PyObject_GetAttrString((PyObject *)&__pyx_type_19dependency_injector_9providers_ThreadLocalSingleton, "__init__"); if (unlikely(!wrapper)) __PYX_ERR(1, 2357, __pyx_L1_error)
+    PyObject *wrapper = PyObject_GetAttrString((PyObject *)&__pyx_type_19dependency_injector_9providers_ThreadLocalSingleton, "__init__"); if (unlikely(!wrapper)) __PYX_ERR(1, 2372, __pyx_L1_error)
     if (Py_TYPE(wrapper) == &PyWrapperDescr_Type) {
       __pyx_wrapperbase_19dependency_injector_9providers_20ThreadLocalSingleton___init__ = *((PyWrapperDescrObject *)wrapper)->d_base;
       __pyx_wrapperbase_19dependency_injector_9providers_20ThreadLocalSingleton___init__.doc = __pyx_doc_19dependency_injector_9providers_20ThreadLocalSingleton___init__;
@@ -103391,28 +103905,28 @@ static int __Pyx_modinit_type_init_code(void) {
     }
   }
   #endif
-  if (__Pyx_SetVtable(__pyx_type_19dependency_injector_9providers_ThreadLocalSingleton.tp_dict, __pyx_vtabptr_19dependency_injector_9providers_ThreadLocalSingleton) < 0) __PYX_ERR(1, 2357, __pyx_L1_error)
-  if (PyObject_SetAttr(__pyx_m, __pyx_n_s_ThreadLocalSingleton, (PyObject *)&__pyx_type_19dependency_injector_9providers_ThreadLocalSingleton) < 0) __PYX_ERR(1, 2357, __pyx_L1_error)
-  if (__Pyx_setup_reduce((PyObject*)&__pyx_type_19dependency_injector_9providers_ThreadLocalSingleton) < 0) __PYX_ERR(1, 2357, __pyx_L1_error)
+  if (__Pyx_SetVtable(__pyx_type_19dependency_injector_9providers_ThreadLocalSingleton.tp_dict, __pyx_vtabptr_19dependency_injector_9providers_ThreadLocalSingleton) < 0) __PYX_ERR(1, 2372, __pyx_L1_error)
+  if (PyObject_SetAttr(__pyx_m, __pyx_n_s_ThreadLocalSingleton, (PyObject *)&__pyx_type_19dependency_injector_9providers_ThreadLocalSingleton) < 0) __PYX_ERR(1, 2372, __pyx_L1_error)
+  if (__Pyx_setup_reduce((PyObject*)&__pyx_type_19dependency_injector_9providers_ThreadLocalSingleton) < 0) __PYX_ERR(1, 2372, __pyx_L1_error)
   __pyx_ptype_19dependency_injector_9providers_ThreadLocalSingleton = &__pyx_type_19dependency_injector_9providers_ThreadLocalSingleton;
   __pyx_vtabptr_19dependency_injector_9providers_DelegatedThreadLocalSingleton = &__pyx_vtable_19dependency_injector_9providers_DelegatedThreadLocalSingleton;
   __pyx_vtable_19dependency_injector_9providers_DelegatedThreadLocalSingleton.__pyx_base = *__pyx_vtabptr_19dependency_injector_9providers_ThreadLocalSingleton;
   __pyx_type_19dependency_injector_9providers_DelegatedThreadLocalSingleton.tp_base = __pyx_ptype_19dependency_injector_9providers_ThreadLocalSingleton;
-  if (PyType_Ready(&__pyx_type_19dependency_injector_9providers_DelegatedThreadLocalSingleton) < 0) __PYX_ERR(1, 2425, __pyx_L1_error)
+  if (PyType_Ready(&__pyx_type_19dependency_injector_9providers_DelegatedThreadLocalSingleton) < 0) __PYX_ERR(1, 2440, __pyx_L1_error)
   #if PY_VERSION_HEX < 0x030800B1
   __pyx_type_19dependency_injector_9providers_DelegatedThreadLocalSingleton.tp_print = 0;
   #endif
   if ((CYTHON_USE_TYPE_SLOTS && CYTHON_USE_PYTYPE_LOOKUP) && likely(!__pyx_type_19dependency_injector_9providers_DelegatedThreadLocalSingleton.tp_dictoffset && __pyx_type_19dependency_injector_9providers_DelegatedThreadLocalSingleton.tp_getattro == PyObject_GenericGetAttr)) {
     __pyx_type_19dependency_injector_9providers_DelegatedThreadLocalSingleton.tp_getattro = __Pyx_PyObject_GenericGetAttr;
   }
-  if (__Pyx_SetVtable(__pyx_type_19dependency_injector_9providers_DelegatedThreadLocalSingleton.tp_dict, __pyx_vtabptr_19dependency_injector_9providers_DelegatedThreadLocalSingleton) < 0) __PYX_ERR(1, 2425, __pyx_L1_error)
-  if (PyObject_SetAttr(__pyx_m, __pyx_n_s_DelegatedThreadLocalSingleton, (PyObject *)&__pyx_type_19dependency_injector_9providers_DelegatedThreadLocalSingleton) < 0) __PYX_ERR(1, 2425, __pyx_L1_error)
-  if (__Pyx_setup_reduce((PyObject*)&__pyx_type_19dependency_injector_9providers_DelegatedThreadLocalSingleton) < 0) __PYX_ERR(1, 2425, __pyx_L1_error)
+  if (__Pyx_SetVtable(__pyx_type_19dependency_injector_9providers_DelegatedThreadLocalSingleton.tp_dict, __pyx_vtabptr_19dependency_injector_9providers_DelegatedThreadLocalSingleton) < 0) __PYX_ERR(1, 2440, __pyx_L1_error)
+  if (PyObject_SetAttr(__pyx_m, __pyx_n_s_DelegatedThreadLocalSingleton, (PyObject *)&__pyx_type_19dependency_injector_9providers_DelegatedThreadLocalSingleton) < 0) __PYX_ERR(1, 2440, __pyx_L1_error)
+  if (__Pyx_setup_reduce((PyObject*)&__pyx_type_19dependency_injector_9providers_DelegatedThreadLocalSingleton) < 0) __PYX_ERR(1, 2440, __pyx_L1_error)
   __pyx_ptype_19dependency_injector_9providers_DelegatedThreadLocalSingleton = &__pyx_type_19dependency_injector_9providers_DelegatedThreadLocalSingleton;
   __pyx_vtabptr_19dependency_injector_9providers_AbstractSingleton = &__pyx_vtable_19dependency_injector_9providers_AbstractSingleton;
   __pyx_vtable_19dependency_injector_9providers_AbstractSingleton.__pyx_base = *__pyx_vtabptr_19dependency_injector_9providers_BaseSingleton;
   __pyx_type_19dependency_injector_9providers_AbstractSingleton.tp_base = __pyx_ptype_19dependency_injector_9providers_BaseSingleton;
-  if (PyType_Ready(&__pyx_type_19dependency_injector_9providers_AbstractSingleton) < 0) __PYX_ERR(1, 2447, __pyx_L1_error)
+  if (PyType_Ready(&__pyx_type_19dependency_injector_9providers_AbstractSingleton) < 0) __PYX_ERR(1, 2462, __pyx_L1_error)
   #if PY_VERSION_HEX < 0x030800B1
   __pyx_type_19dependency_injector_9providers_AbstractSingleton.tp_print = 0;
   #endif
@@ -103421,7 +103935,7 @@ static int __Pyx_modinit_type_init_code(void) {
   }
   #if CYTHON_COMPILING_IN_CPYTHON
   {
-    PyObject *wrapper = PyObject_GetAttrString((PyObject *)&__pyx_type_19dependency_injector_9providers_AbstractSingleton, "__call__"); if (unlikely(!wrapper)) __PYX_ERR(1, 2447, __pyx_L1_error)
+    PyObject *wrapper = PyObject_GetAttrString((PyObject *)&__pyx_type_19dependency_injector_9providers_AbstractSingleton, "__call__"); if (unlikely(!wrapper)) __PYX_ERR(1, 2462, __pyx_L1_error)
     if (Py_TYPE(wrapper) == &PyWrapperDescr_Type) {
       __pyx_wrapperbase_19dependency_injector_9providers_17AbstractSingleton___call__ = *((PyWrapperDescrObject *)wrapper)->d_base;
       __pyx_wrapperbase_19dependency_injector_9providers_17AbstractSingleton___call__.doc = __pyx_doc_19dependency_injector_9providers_17AbstractSingleton___call__;
@@ -103429,14 +103943,14 @@ static int __Pyx_modinit_type_init_code(void) {
     }
   }
   #endif
-  if (__Pyx_SetVtable(__pyx_type_19dependency_injector_9providers_AbstractSingleton.tp_dict, __pyx_vtabptr_19dependency_injector_9providers_AbstractSingleton) < 0) __PYX_ERR(1, 2447, __pyx_L1_error)
-  if (PyObject_SetAttr(__pyx_m, __pyx_n_s_AbstractSingleton, (PyObject *)&__pyx_type_19dependency_injector_9providers_AbstractSingleton) < 0) __PYX_ERR(1, 2447, __pyx_L1_error)
-  if (__Pyx_setup_reduce((PyObject*)&__pyx_type_19dependency_injector_9providers_AbstractSingleton) < 0) __PYX_ERR(1, 2447, __pyx_L1_error)
+  if (__Pyx_SetVtable(__pyx_type_19dependency_injector_9providers_AbstractSingleton.tp_dict, __pyx_vtabptr_19dependency_injector_9providers_AbstractSingleton) < 0) __PYX_ERR(1, 2462, __pyx_L1_error)
+  if (PyObject_SetAttr(__pyx_m, __pyx_n_s_AbstractSingleton, (PyObject *)&__pyx_type_19dependency_injector_9providers_AbstractSingleton) < 0) __PYX_ERR(1, 2462, __pyx_L1_error)
+  if (__Pyx_setup_reduce((PyObject*)&__pyx_type_19dependency_injector_9providers_AbstractSingleton) < 0) __PYX_ERR(1, 2462, __pyx_L1_error)
   __pyx_ptype_19dependency_injector_9providers_AbstractSingleton = &__pyx_type_19dependency_injector_9providers_AbstractSingleton;
   __pyx_vtabptr_19dependency_injector_9providers_SingletonDelegate = &__pyx_vtable_19dependency_injector_9providers_SingletonDelegate;
   __pyx_vtable_19dependency_injector_9providers_SingletonDelegate.__pyx_base = *__pyx_vtabptr_19dependency_injector_9providers_Delegate;
   __pyx_type_19dependency_injector_9providers_SingletonDelegate.tp_base = __pyx_ptype_19dependency_injector_9providers_Delegate;
-  if (PyType_Ready(&__pyx_type_19dependency_injector_9providers_SingletonDelegate) < 0) __PYX_ERR(1, 2492, __pyx_L1_error)
+  if (PyType_Ready(&__pyx_type_19dependency_injector_9providers_SingletonDelegate) < 0) __PYX_ERR(1, 2507, __pyx_L1_error)
   #if PY_VERSION_HEX < 0x030800B1
   __pyx_type_19dependency_injector_9providers_SingletonDelegate.tp_print = 0;
   #endif
@@ -103445,7 +103959,7 @@ static int __Pyx_modinit_type_init_code(void) {
   }
   #if CYTHON_COMPILING_IN_CPYTHON
   {
-    PyObject *wrapper = PyObject_GetAttrString((PyObject *)&__pyx_type_19dependency_injector_9providers_SingletonDelegate, "__init__"); if (unlikely(!wrapper)) __PYX_ERR(1, 2492, __pyx_L1_error)
+    PyObject *wrapper = PyObject_GetAttrString((PyObject *)&__pyx_type_19dependency_injector_9providers_SingletonDelegate, "__init__"); if (unlikely(!wrapper)) __PYX_ERR(1, 2507, __pyx_L1_error)
     if (Py_TYPE(wrapper) == &PyWrapperDescr_Type) {
       __pyx_wrapperbase_19dependency_injector_9providers_17SingletonDelegate___init__ = *((PyWrapperDescrObject *)wrapper)->d_base;
       __pyx_wrapperbase_19dependency_injector_9providers_17SingletonDelegate___init__.doc = __pyx_doc_19dependency_injector_9providers_17SingletonDelegate___init__;
@@ -103453,15 +103967,15 @@ static int __Pyx_modinit_type_init_code(void) {
     }
   }
   #endif
-  if (__Pyx_SetVtable(__pyx_type_19dependency_injector_9providers_SingletonDelegate.tp_dict, __pyx_vtabptr_19dependency_injector_9providers_SingletonDelegate) < 0) __PYX_ERR(1, 2492, __pyx_L1_error)
-  if (PyObject_SetAttr(__pyx_m, __pyx_n_s_SingletonDelegate, (PyObject *)&__pyx_type_19dependency_injector_9providers_SingletonDelegate) < 0) __PYX_ERR(1, 2492, __pyx_L1_error)
-  if (__Pyx_setup_reduce((PyObject*)&__pyx_type_19dependency_injector_9providers_SingletonDelegate) < 0) __PYX_ERR(1, 2492, __pyx_L1_error)
+  if (__Pyx_SetVtable(__pyx_type_19dependency_injector_9providers_SingletonDelegate.tp_dict, __pyx_vtabptr_19dependency_injector_9providers_SingletonDelegate) < 0) __PYX_ERR(1, 2507, __pyx_L1_error)
+  if (PyObject_SetAttr(__pyx_m, __pyx_n_s_SingletonDelegate, (PyObject *)&__pyx_type_19dependency_injector_9providers_SingletonDelegate) < 0) __PYX_ERR(1, 2507, __pyx_L1_error)
+  if (__Pyx_setup_reduce((PyObject*)&__pyx_type_19dependency_injector_9providers_SingletonDelegate) < 0) __PYX_ERR(1, 2507, __pyx_L1_error)
   __pyx_ptype_19dependency_injector_9providers_SingletonDelegate = &__pyx_type_19dependency_injector_9providers_SingletonDelegate;
   __pyx_vtabptr_19dependency_injector_9providers_List = &__pyx_vtable_19dependency_injector_9providers_List;
   __pyx_vtable_19dependency_injector_9providers_List.__pyx_base = *__pyx_vtabptr_19dependency_injector_9providers_Provider;
   __pyx_vtable_19dependency_injector_9providers_List.__pyx_base._provide = (PyObject *(*)(struct __pyx_obj_19dependency_injector_9providers_Provider *, PyObject *, PyObject *, int __pyx_skip_dispatch))__pyx_f_19dependency_injector_9providers_4List__provide;
   __pyx_type_19dependency_injector_9providers_List.tp_base = __pyx_ptype_19dependency_injector_9providers_Provider;
-  if (PyType_Ready(&__pyx_type_19dependency_injector_9providers_List) < 0) __PYX_ERR(1, 2514, __pyx_L1_error)
+  if (PyType_Ready(&__pyx_type_19dependency_injector_9providers_List) < 0) __PYX_ERR(1, 2529, __pyx_L1_error)
   #if PY_VERSION_HEX < 0x030800B1
   __pyx_type_19dependency_injector_9providers_List.tp_print = 0;
   #endif
@@ -103470,7 +103984,7 @@ static int __Pyx_modinit_type_init_code(void) {
   }
   #if CYTHON_COMPILING_IN_CPYTHON
   {
-    PyObject *wrapper = PyObject_GetAttrString((PyObject *)&__pyx_type_19dependency_injector_9providers_List, "__init__"); if (unlikely(!wrapper)) __PYX_ERR(1, 2514, __pyx_L1_error)
+    PyObject *wrapper = PyObject_GetAttrString((PyObject *)&__pyx_type_19dependency_injector_9providers_List, "__init__"); if (unlikely(!wrapper)) __PYX_ERR(1, 2529, __pyx_L1_error)
     if (Py_TYPE(wrapper) == &PyWrapperDescr_Type) {
       __pyx_wrapperbase_19dependency_injector_9providers_4List___init__ = *((PyWrapperDescrObject *)wrapper)->d_base;
       __pyx_wrapperbase_19dependency_injector_9providers_4List___init__.doc = __pyx_doc_19dependency_injector_9providers_4List___init__;
@@ -103480,7 +103994,7 @@ static int __Pyx_modinit_type_init_code(void) {
   #endif
   #if CYTHON_COMPILING_IN_CPYTHON
   {
-    PyObject *wrapper = PyObject_GetAttrString((PyObject *)&__pyx_type_19dependency_injector_9providers_List, "__str__"); if (unlikely(!wrapper)) __PYX_ERR(1, 2514, __pyx_L1_error)
+    PyObject *wrapper = PyObject_GetAttrString((PyObject *)&__pyx_type_19dependency_injector_9providers_List, "__str__"); if (unlikely(!wrapper)) __PYX_ERR(1, 2529, __pyx_L1_error)
     if (Py_TYPE(wrapper) == &PyWrapperDescr_Type) {
       __pyx_wrapperbase_19dependency_injector_9providers_4List_4__str__ = *((PyWrapperDescrObject *)wrapper)->d_base;
       __pyx_wrapperbase_19dependency_injector_9providers_4List_4__str__.doc = __pyx_doc_19dependency_injector_9providers_4List_4__str__;
@@ -103488,15 +104002,15 @@ static int __Pyx_modinit_type_init_code(void) {
     }
   }
   #endif
-  if (__Pyx_SetVtable(__pyx_type_19dependency_injector_9providers_List.tp_dict, __pyx_vtabptr_19dependency_injector_9providers_List) < 0) __PYX_ERR(1, 2514, __pyx_L1_error)
-  if (PyObject_SetAttr(__pyx_m, __pyx_n_s_List, (PyObject *)&__pyx_type_19dependency_injector_9providers_List) < 0) __PYX_ERR(1, 2514, __pyx_L1_error)
-  if (__Pyx_setup_reduce((PyObject*)&__pyx_type_19dependency_injector_9providers_List) < 0) __PYX_ERR(1, 2514, __pyx_L1_error)
+  if (__Pyx_SetVtable(__pyx_type_19dependency_injector_9providers_List.tp_dict, __pyx_vtabptr_19dependency_injector_9providers_List) < 0) __PYX_ERR(1, 2529, __pyx_L1_error)
+  if (PyObject_SetAttr(__pyx_m, __pyx_n_s_List, (PyObject *)&__pyx_type_19dependency_injector_9providers_List) < 0) __PYX_ERR(1, 2529, __pyx_L1_error)
+  if (__Pyx_setup_reduce((PyObject*)&__pyx_type_19dependency_injector_9providers_List) < 0) __PYX_ERR(1, 2529, __pyx_L1_error)
   __pyx_ptype_19dependency_injector_9providers_List = &__pyx_type_19dependency_injector_9providers_List;
   __pyx_vtabptr_19dependency_injector_9providers_Dict = &__pyx_vtable_19dependency_injector_9providers_Dict;
   __pyx_vtable_19dependency_injector_9providers_Dict.__pyx_base = *__pyx_vtabptr_19dependency_injector_9providers_Provider;
   __pyx_vtable_19dependency_injector_9providers_Dict.__pyx_base._provide = (PyObject *(*)(struct __pyx_obj_19dependency_injector_9providers_Provider *, PyObject *, PyObject *, int __pyx_skip_dispatch))__pyx_f_19dependency_injector_9providers_4Dict__provide;
   __pyx_type_19dependency_injector_9providers_Dict.tp_base = __pyx_ptype_19dependency_injector_9providers_Provider;
-  if (PyType_Ready(&__pyx_type_19dependency_injector_9providers_Dict) < 0) __PYX_ERR(1, 2616, __pyx_L1_error)
+  if (PyType_Ready(&__pyx_type_19dependency_injector_9providers_Dict) < 0) __PYX_ERR(1, 2631, __pyx_L1_error)
   #if PY_VERSION_HEX < 0x030800B1
   __pyx_type_19dependency_injector_9providers_Dict.tp_print = 0;
   #endif
@@ -103505,7 +104019,7 @@ static int __Pyx_modinit_type_init_code(void) {
   }
   #if CYTHON_COMPILING_IN_CPYTHON
   {
-    PyObject *wrapper = PyObject_GetAttrString((PyObject *)&__pyx_type_19dependency_injector_9providers_Dict, "__init__"); if (unlikely(!wrapper)) __PYX_ERR(1, 2616, __pyx_L1_error)
+    PyObject *wrapper = PyObject_GetAttrString((PyObject *)&__pyx_type_19dependency_injector_9providers_Dict, "__init__"); if (unlikely(!wrapper)) __PYX_ERR(1, 2631, __pyx_L1_error)
     if (Py_TYPE(wrapper) == &PyWrapperDescr_Type) {
       __pyx_wrapperbase_19dependency_injector_9providers_4Dict___init__ = *((PyWrapperDescrObject *)wrapper)->d_base;
       __pyx_wrapperbase_19dependency_injector_9providers_4Dict___init__.doc = __pyx_doc_19dependency_injector_9providers_4Dict___init__;
@@ -103515,7 +104029,7 @@ static int __Pyx_modinit_type_init_code(void) {
   #endif
   #if CYTHON_COMPILING_IN_CPYTHON
   {
-    PyObject *wrapper = PyObject_GetAttrString((PyObject *)&__pyx_type_19dependency_injector_9providers_Dict, "__str__"); if (unlikely(!wrapper)) __PYX_ERR(1, 2616, __pyx_L1_error)
+    PyObject *wrapper = PyObject_GetAttrString((PyObject *)&__pyx_type_19dependency_injector_9providers_Dict, "__str__"); if (unlikely(!wrapper)) __PYX_ERR(1, 2631, __pyx_L1_error)
     if (Py_TYPE(wrapper) == &PyWrapperDescr_Type) {
       __pyx_wrapperbase_19dependency_injector_9providers_4Dict_4__str__ = *((PyWrapperDescrObject *)wrapper)->d_base;
       __pyx_wrapperbase_19dependency_injector_9providers_4Dict_4__str__.doc = __pyx_doc_19dependency_injector_9providers_4Dict_4__str__;
@@ -103523,36 +104037,36 @@ static int __Pyx_modinit_type_init_code(void) {
     }
   }
   #endif
-  if (__Pyx_SetVtable(__pyx_type_19dependency_injector_9providers_Dict.tp_dict, __pyx_vtabptr_19dependency_injector_9providers_Dict) < 0) __PYX_ERR(1, 2616, __pyx_L1_error)
-  if (PyObject_SetAttr(__pyx_m, __pyx_n_s_Dict, (PyObject *)&__pyx_type_19dependency_injector_9providers_Dict) < 0) __PYX_ERR(1, 2616, __pyx_L1_error)
-  if (__Pyx_setup_reduce((PyObject*)&__pyx_type_19dependency_injector_9providers_Dict) < 0) __PYX_ERR(1, 2616, __pyx_L1_error)
+  if (__Pyx_SetVtable(__pyx_type_19dependency_injector_9providers_Dict.tp_dict, __pyx_vtabptr_19dependency_injector_9providers_Dict) < 0) __PYX_ERR(1, 2631, __pyx_L1_error)
+  if (PyObject_SetAttr(__pyx_m, __pyx_n_s_Dict, (PyObject *)&__pyx_type_19dependency_injector_9providers_Dict) < 0) __PYX_ERR(1, 2631, __pyx_L1_error)
+  if (__Pyx_setup_reduce((PyObject*)&__pyx_type_19dependency_injector_9providers_Dict) < 0) __PYX_ERR(1, 2631, __pyx_L1_error)
   __pyx_ptype_19dependency_injector_9providers_Dict = &__pyx_type_19dependency_injector_9providers_Dict;
   __pyx_vtabptr_19dependency_injector_9providers_Resource = &__pyx_vtable_19dependency_injector_9providers_Resource;
   __pyx_vtable_19dependency_injector_9providers_Resource.__pyx_base = *__pyx_vtabptr_19dependency_injector_9providers_Provider;
   __pyx_vtable_19dependency_injector_9providers_Resource.__pyx_base._provide = (PyObject *(*)(struct __pyx_obj_19dependency_injector_9providers_Provider *, PyObject *, PyObject *, int __pyx_skip_dispatch))__pyx_f_19dependency_injector_9providers_8Resource__provide;
   __pyx_type_19dependency_injector_9providers_Resource.tp_base = __pyx_ptype_19dependency_injector_9providers_Provider;
-  if (PyType_Ready(&__pyx_type_19dependency_injector_9providers_Resource) < 0) __PYX_ERR(1, 2728, __pyx_L1_error)
+  if (PyType_Ready(&__pyx_type_19dependency_injector_9providers_Resource) < 0) __PYX_ERR(1, 2743, __pyx_L1_error)
   #if PY_VERSION_HEX < 0x030800B1
   __pyx_type_19dependency_injector_9providers_Resource.tp_print = 0;
   #endif
   if ((CYTHON_USE_TYPE_SLOTS && CYTHON_USE_PYTYPE_LOOKUP) && likely(!__pyx_type_19dependency_injector_9providers_Resource.tp_dictoffset && __pyx_type_19dependency_injector_9providers_Resource.tp_getattro == PyObject_GenericGetAttr)) {
     __pyx_type_19dependency_injector_9providers_Resource.tp_getattro = __Pyx_PyObject_GenericGetAttr;
   }
-  if (__Pyx_SetVtable(__pyx_type_19dependency_injector_9providers_Resource.tp_dict, __pyx_vtabptr_19dependency_injector_9providers_Resource) < 0) __PYX_ERR(1, 2728, __pyx_L1_error)
-  if (PyObject_SetAttr(__pyx_m, __pyx_n_s_Resource, (PyObject *)&__pyx_type_19dependency_injector_9providers_Resource) < 0) __PYX_ERR(1, 2728, __pyx_L1_error)
-  if (__Pyx_setup_reduce((PyObject*)&__pyx_type_19dependency_injector_9providers_Resource) < 0) __PYX_ERR(1, 2728, __pyx_L1_error)
+  if (__Pyx_SetVtable(__pyx_type_19dependency_injector_9providers_Resource.tp_dict, __pyx_vtabptr_19dependency_injector_9providers_Resource) < 0) __PYX_ERR(1, 2743, __pyx_L1_error)
+  if (PyObject_SetAttr(__pyx_m, __pyx_n_s_Resource, (PyObject *)&__pyx_type_19dependency_injector_9providers_Resource) < 0) __PYX_ERR(1, 2743, __pyx_L1_error)
+  if (__Pyx_setup_reduce((PyObject*)&__pyx_type_19dependency_injector_9providers_Resource) < 0) __PYX_ERR(1, 2743, __pyx_L1_error)
   __pyx_ptype_19dependency_injector_9providers_Resource = &__pyx_type_19dependency_injector_9providers_Resource;
   __pyx_vtabptr_19dependency_injector_9providers_Container = &__pyx_vtable_19dependency_injector_9providers_Container;
   __pyx_vtable_19dependency_injector_9providers_Container.__pyx_base = *__pyx_vtabptr_19dependency_injector_9providers_Provider;
   __pyx_vtable_19dependency_injector_9providers_Container.__pyx_base._provide = (PyObject *(*)(struct __pyx_obj_19dependency_injector_9providers_Provider *, PyObject *, PyObject *, int __pyx_skip_dispatch))__pyx_f_19dependency_injector_9providers_9Container__provide;
   __pyx_type_19dependency_injector_9providers_Container.tp_base = __pyx_ptype_19dependency_injector_9providers_Provider;
-  if (PyType_Ready(&__pyx_type_19dependency_injector_9providers_Container) < 0) __PYX_ERR(1, 3030, __pyx_L1_error)
+  if (PyType_Ready(&__pyx_type_19dependency_injector_9providers_Container) < 0) __PYX_ERR(1, 3045, __pyx_L1_error)
   #if PY_VERSION_HEX < 0x030800B1
   __pyx_type_19dependency_injector_9providers_Container.tp_print = 0;
   #endif
   #if CYTHON_COMPILING_IN_CPYTHON
   {
-    PyObject *wrapper = PyObject_GetAttrString((PyObject *)&__pyx_type_19dependency_injector_9providers_Container, "__init__"); if (unlikely(!wrapper)) __PYX_ERR(1, 3030, __pyx_L1_error)
+    PyObject *wrapper = PyObject_GetAttrString((PyObject *)&__pyx_type_19dependency_injector_9providers_Container, "__init__"); if (unlikely(!wrapper)) __PYX_ERR(1, 3045, __pyx_L1_error)
     if (Py_TYPE(wrapper) == &PyWrapperDescr_Type) {
       __pyx_wrapperbase_19dependency_injector_9providers_9Container___init__ = *((PyWrapperDescrObject *)wrapper)->d_base;
       __pyx_wrapperbase_19dependency_injector_9providers_9Container___init__.doc = __pyx_doc_19dependency_injector_9providers_9Container___init__;
@@ -103562,7 +104076,7 @@ static int __Pyx_modinit_type_init_code(void) {
   #endif
   #if CYTHON_COMPILING_IN_CPYTHON
   {
-    PyObject *wrapper = PyObject_GetAttrString((PyObject *)&__pyx_type_19dependency_injector_9providers_Container, "__getattr__"); if (unlikely(!wrapper)) __PYX_ERR(1, 3030, __pyx_L1_error)
+    PyObject *wrapper = PyObject_GetAttrString((PyObject *)&__pyx_type_19dependency_injector_9providers_Container, "__getattr__"); if (unlikely(!wrapper)) __PYX_ERR(1, 3045, __pyx_L1_error)
     if (Py_TYPE(wrapper) == &PyWrapperDescr_Type) {
       __pyx_wrapperbase_19dependency_injector_9providers_9Container_4__getattr__ = *((PyWrapperDescrObject *)wrapper)->d_base;
       __pyx_wrapperbase_19dependency_injector_9providers_9Container_4__getattr__.doc = __pyx_doc_19dependency_injector_9providers_9Container_4__getattr__;
@@ -103570,21 +104084,21 @@ static int __Pyx_modinit_type_init_code(void) {
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   }
   #endif
-  if (__Pyx_SetVtable(__pyx_type_19dependency_injector_9providers_Container.tp_dict, __pyx_vtabptr_19dependency_injector_9providers_Container) < 0) __PYX_ERR(1, 3030, __pyx_L1_error)
-  if (PyObject_SetAttr(__pyx_m, __pyx_n_s_Container, (PyObject *)&__pyx_type_19dependency_injector_9providers_Container) < 0) __PYX_ERR(1, 3030, __pyx_L1_error)
-  if (__Pyx_setup_reduce((PyObject*)&__pyx_type_19dependency_injector_9providers_Container) < 0) __PYX_ERR(1, 3030, __pyx_L1_error)
+  if (__Pyx_SetVtable(__pyx_type_19dependency_injector_9providers_Container.tp_dict, __pyx_vtabptr_19dependency_injector_9providers_Container) < 0) __PYX_ERR(1, 3045, __pyx_L1_error)
+  if (PyObject_SetAttr(__pyx_m, __pyx_n_s_Container, (PyObject *)&__pyx_type_19dependency_injector_9providers_Container) < 0) __PYX_ERR(1, 3045, __pyx_L1_error)
+  if (__Pyx_setup_reduce((PyObject*)&__pyx_type_19dependency_injector_9providers_Container) < 0) __PYX_ERR(1, 3045, __pyx_L1_error)
   __pyx_ptype_19dependency_injector_9providers_Container = &__pyx_type_19dependency_injector_9providers_Container;
   __pyx_vtabptr_19dependency_injector_9providers_Selector = &__pyx_vtable_19dependency_injector_9providers_Selector;
   __pyx_vtable_19dependency_injector_9providers_Selector.__pyx_base = *__pyx_vtabptr_19dependency_injector_9providers_Provider;
   __pyx_vtable_19dependency_injector_9providers_Selector.__pyx_base._provide = (PyObject *(*)(struct __pyx_obj_19dependency_injector_9providers_Provider *, PyObject *, PyObject *, int __pyx_skip_dispatch))__pyx_f_19dependency_injector_9providers_8Selector__provide;
   __pyx_type_19dependency_injector_9providers_Selector.tp_base = __pyx_ptype_19dependency_injector_9providers_Provider;
-  if (PyType_Ready(&__pyx_type_19dependency_injector_9providers_Selector) < 0) __PYX_ERR(1, 3099, __pyx_L1_error)
+  if (PyType_Ready(&__pyx_type_19dependency_injector_9providers_Selector) < 0) __PYX_ERR(1, 3114, __pyx_L1_error)
   #if PY_VERSION_HEX < 0x030800B1
   __pyx_type_19dependency_injector_9providers_Selector.tp_print = 0;
   #endif
   #if CYTHON_COMPILING_IN_CPYTHON
   {
-    PyObject *wrapper = PyObject_GetAttrString((PyObject *)&__pyx_type_19dependency_injector_9providers_Selector, "__init__"); if (unlikely(!wrapper)) __PYX_ERR(1, 3099, __pyx_L1_error)
+    PyObject *wrapper = PyObject_GetAttrString((PyObject *)&__pyx_type_19dependency_injector_9providers_Selector, "__init__"); if (unlikely(!wrapper)) __PYX_ERR(1, 3114, __pyx_L1_error)
     if (Py_TYPE(wrapper) == &PyWrapperDescr_Type) {
       __pyx_wrapperbase_19dependency_injector_9providers_8Selector___init__ = *((PyWrapperDescrObject *)wrapper)->d_base;
       __pyx_wrapperbase_19dependency_injector_9providers_8Selector___init__.doc = __pyx_doc_19dependency_injector_9providers_8Selector___init__;
@@ -103594,7 +104108,7 @@ static int __Pyx_modinit_type_init_code(void) {
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   #if CYTHON_COMPILING_IN_CPYTHON
   {
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+    PyObject *wrapper = PyObject_GetAttrString((PyObject *)&__pyx_type_19dependency_injector_9providers_Selector, "__getattr__"); if (unlikely(!wrapper)) __PYX_ERR(1, 3114, __pyx_L1_error)
     if (Py_TYPE(wrapper) == &PyWrapperDescr_Type) {
       __pyx_wrapperbase_19dependency_injector_9providers_8Selector_4__getattr__ = *((PyWrapperDescrObject *)wrapper)->d_base;
       __pyx_wrapperbase_19dependency_injector_9providers_8Selector_4__getattr__.doc = __pyx_doc_19dependency_injector_9providers_8Selector_4__getattr__;
@@ -103604,7 +104118,7 @@ static int __Pyx_modinit_type_init_code(void) {
   #endif
   #if CYTHON_COMPILING_IN_CPYTHON
   {
-    PyObject *wrapper = PyObject_GetAttrString((PyObject *)&__pyx_type_19dependency_injector_9providers_Selector, "__str__"); if (unlikely(!wrapper)) __PYX_ERR(1, 3099, __pyx_L1_error)
+    PyObject *wrapper = PyObject_GetAttrString((PyObject *)&__pyx_type_19dependency_injector_9providers_Selector, "__str__"); if (unlikely(!wrapper)) __PYX_ERR(1, 3114, __pyx_L1_error)
     if (Py_TYPE(wrapper) == &PyWrapperDescr_Type) {
       __pyx_wrapperbase_19dependency_injector_9providers_8Selector_6__str__ = *((PyWrapperDescrObject *)wrapper)->d_base;
       __pyx_wrapperbase_19dependency_injector_9providers_8Selector_6__str__.doc = __pyx_doc_19dependency_injector_9providers_8Selector_6__str__;
@@ -103612,70 +104126,70 @@ static int __Pyx_modinit_type_init_code(void) {
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-  if (__Pyx_setup_reduce((PyObject*)&__pyx_type_19dependency_injector_9providers_Selector) < 0) __PYX_ERR(1, 3099, __pyx_L1_error)
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   __pyx_vtable_19dependency_injector_9providers_ProvidedInstance.__pyx_base = *__pyx_vtabptr_19dependency_injector_9providers_Provider;
   __pyx_vtable_19dependency_injector_9providers_ProvidedInstance.__pyx_base._provide = (PyObject *(*)(struct __pyx_obj_19dependency_injector_9providers_Provider *, PyObject *, PyObject *, int __pyx_skip_dispatch))__pyx_f_19dependency_injector_9providers_16ProvidedInstance__provide;
   __pyx_type_19dependency_injector_9providers_ProvidedInstance.tp_base = __pyx_ptype_19dependency_injector_9providers_Provider;
-  if (PyType_Ready(&__pyx_type_19dependency_injector_9providers_ProvidedInstance) < 0) __PYX_ERR(1, 3196, __pyx_L1_error)
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-  if (__Pyx_SetVtable(__pyx_type_19dependency_injector_9providers_ProvidedInstance.tp_dict, __pyx_vtabptr_19dependency_injector_9providers_ProvidedInstance) < 0) __PYX_ERR(1, 3196, __pyx_L1_error)
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-  if (__Pyx_setup_reduce((PyObject*)&__pyx_type_19dependency_injector_9providers_ProvidedInstance) < 0) __PYX_ERR(1, 3196, __pyx_L1_error)
+  if (__Pyx_SetVtable(__pyx_type_19dependency_injector_9providers_ProvidedInstance.tp_dict, __pyx_vtabptr_19dependency_injector_9providers_ProvidedInstance) < 0) __PYX_ERR(1, 3211, __pyx_L1_error)
+  if (PyObject_SetAttr(__pyx_m, __pyx_n_s_ProvidedInstance, (PyObject *)&__pyx_type_19dependency_injector_9providers_ProvidedInstance) < 0) __PYX_ERR(1, 3211, __pyx_L1_error)
+  if (__Pyx_setup_reduce((PyObject*)&__pyx_type_19dependency_injector_9providers_ProvidedInstance) < 0) __PYX_ERR(1, 3211, __pyx_L1_error)
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   __pyx_vtabptr_19dependency_injector_9providers_AttributeGetter = &__pyx_vtable_19dependency_injector_9providers_AttributeGetter;
   __pyx_vtable_19dependency_injector_9providers_AttributeGetter.__pyx_base = *__pyx_vtabptr_19dependency_injector_9providers_Provider;
   __pyx_vtable_19dependency_injector_9providers_AttributeGetter.__pyx_base._provide = (PyObject *(*)(struct __pyx_obj_19dependency_injector_9providers_Provider *, PyObject *, PyObject *, int __pyx_skip_dispatch))__pyx_f_19dependency_injector_9providers_15AttributeGetter__provide;
   __pyx_type_19dependency_injector_9providers_AttributeGetter.tp_base = __pyx_ptype_19dependency_injector_9providers_Provider;
-  if (PyType_Ready(&__pyx_type_19dependency_injector_9providers_AttributeGetter) < 0) __PYX_ERR(1, 3263, __pyx_L1_error)
+  if (PyType_Ready(&__pyx_type_19dependency_injector_9providers_AttributeGetter) < 0) __PYX_ERR(1, 3278, __pyx_L1_error)
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-  if (__Pyx_setup_reduce((PyObject*)&__pyx_type_19dependency_injector_9providers_AttributeGetter) < 0) __PYX_ERR(1, 3263, __pyx_L1_error)
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+  if (PyObject_SetAttr(__pyx_m, __pyx_n_s_AttributeGetter, (PyObject *)&__pyx_type_19dependency_injector_9providers_AttributeGetter) < 0) __PYX_ERR(1, 3278, __pyx_L1_error)
+  if (__Pyx_setup_reduce((PyObject*)&__pyx_type_19dependency_injector_9providers_AttributeGetter) < 0) __PYX_ERR(1, 3278, __pyx_L1_error)
   __pyx_ptype_19dependency_injector_9providers_AttributeGetter = &__pyx_type_19dependency_injector_9providers_AttributeGetter;
   __pyx_vtabptr_19dependency_injector_9providers_ItemGetter = &__pyx_vtable_19dependency_injector_9providers_ItemGetter;
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-  if (PyType_Ready(&__pyx_type_19dependency_injector_9providers_ItemGetter) < 0) __PYX_ERR(1, 3323, __pyx_L1_error)
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-  if (__Pyx_setup_reduce((PyObject*)&__pyx_type_19dependency_injector_9providers_ItemGetter) < 0) __PYX_ERR(1, 3323, __pyx_L1_error)
+  if (__Pyx_SetVtable(__pyx_type_19dependency_injector_9providers_ItemGetter.tp_dict, __pyx_vtabptr_19dependency_injector_9providers_ItemGetter) < 0) __PYX_ERR(1, 3338, __pyx_L1_error)
+  if (PyObject_SetAttr(__pyx_m, __pyx_n_s_ItemGetter, (PyObject *)&__pyx_type_19dependency_injector_9providers_ItemGetter) < 0) __PYX_ERR(1, 3338, __pyx_L1_error)
+  if (__Pyx_setup_reduce((PyObject*)&__pyx_type_19dependency_injector_9providers_ItemGetter) < 0) __PYX_ERR(1, 3338, __pyx_L1_error)
   __pyx_ptype_19dependency_injector_9providers_ItemGetter = &__pyx_type_19dependency_injector_9providers_ItemGetter;
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-  if (PyType_Ready(&__pyx_type_19dependency_injector_9providers_MethodCaller) < 0) __PYX_ERR(1, 3383, __pyx_L1_error)
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-  if (__Pyx_setup_reduce((PyObject*)&__pyx_type_19dependency_injector_9providers_MethodCaller) < 0) __PYX_ERR(1, 3383, __pyx_L1_error)
+  if (__Pyx_SetVtable(__pyx_type_19dependency_injector_9providers_MethodCaller.tp_dict, __pyx_vtabptr_19dependency_injector_9providers_MethodCaller) < 0) __PYX_ERR(1, 3398, __pyx_L1_error)
+  if (PyObject_SetAttr(__pyx_m, __pyx_n_s_MethodCaller, (PyObject *)&__pyx_type_19dependency_injector_9providers_MethodCaller) < 0) __PYX_ERR(1, 3398, __pyx_L1_error)
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-  if (PyType_Ready(&__pyx_type_19dependency_injector_9providers_Injection) < 0) __PYX_ERR(1, 3491, __pyx_L1_error)
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-  if (__Pyx_setup_reduce((PyObject*)&__pyx_type_19dependency_injector_9providers_Injection) < 0) __PYX_ERR(1, 3491, __pyx_L1_error)
+  if (PyObject_SetAttr(__pyx_m, __pyx_n_s_Injection, (PyObject *)&__pyx_type_19dependency_injector_9providers_Injection) < 0) __PYX_ERR(1, 3506, __pyx_L1_error)
+  if (__Pyx_setup_reduce((PyObject*)&__pyx_type_19dependency_injector_9providers_Injection) < 0) __PYX_ERR(1, 3506, __pyx_L1_error)
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-  if (PyType_Ready(&__pyx_type_19dependency_injector_9providers_PositionalInjection) < 0) __PYX_ERR(1, 3495, __pyx_L1_error)
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-  if (__Pyx_setup_reduce((PyObject*)&__pyx_type_19dependency_injector_9providers_PositionalInjection) < 0) __PYX_ERR(1, 3495, __pyx_L1_error)
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-  if (__Pyx_setup_reduce((PyObject*)&__pyx_type_19dependency_injector_9providers_NamedInjection) < 0) __PYX_ERR(1, 3523, __pyx_L1_error)
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+  __pyx_t_1 = PyCFunction_NewEx(&__pyx_mdef_19dependency_injector_9providers_29isasyncgenfunction, NULL, __pyx_n_s_dependency_injector_providers); if (unlikely(!__pyx_t_1)) __PYX_ERR(1, 3731, __pyx_L1_error)
   __Pyx_GOTREF(__pyx_t_1);
-  if (PyDict_SetItem(__pyx_d, __pyx_n_s_isasyncgenfunction, __pyx_t_1) < 0) __PYX_ERR(1, 3716, __pyx_L1_error)
+  if (PyDict_SetItem(__pyx_d, __pyx_n_s_isasyncgenfunction, __pyx_t_1) < 0) __PYX_ERR(1, 3731, __pyx_L1_error)
   __Pyx_DECREF(__pyx_t_1); __pyx_t_1 = 0;
 
   /* "(tree fragment)":1
diff --git a/src/dependency_injector/providers.pxd b/src/dependency_injector/providers.pxd
index 55ec23ca..bb8be627 100644
--- a/src/dependency_injector/providers.pxd
+++ b/src/dependency_injector/providers.pxd
@@ -98,6 +98,7 @@ cdef class ConfigurationOption(Provider):
     cdef tuple __name
     cdef object __root_ref
     cdef dict __children
+    cdef bint __required
     cdef object __cache
 
 
@@ -107,6 +108,7 @@ cdef class TypedConfigurationOption(Callable):
 
 cdef class Configuration(Object):
     cdef str __name
+    cdef bint __strict
     cdef dict __children
     cdef object __weakref__
 
diff --git a/src/dependency_injector/providers.pyi b/src/dependency_injector/providers.pyi
index 61a598f8..58da9318 100644
--- a/src/dependency_injector/providers.pyi
+++ b/src/dependency_injector/providers.pyi
@@ -146,6 +146,8 @@ class ConfigurationOption(Provider[Any]):
     def as_int(self) -> TypedConfigurationOption[int]: ...
     def as_float(self) -> TypedConfigurationOption[float]: ...
     def as_(self, callback: _Callable[..., T], *args: Injection, **kwargs: Injection) -> TypedConfigurationOption[T]: ...
+    def required(self) -> ConfigurationOption: ...
+    def is_required(self) -> bool: ...
     def update(self, value: Any) -> None: ...
     def from_ini(self, filepath: Union[Path, str]) -> None: ...
     def from_yaml(self, filepath: Union[Path, str]) -> None: ...
@@ -160,7 +162,7 @@ class TypedConfigurationOption(Callable[T]):
 
 class Configuration(Object[Any]):
     DEFAULT_NAME: str = 'config'
-    def __init__(self, name: str = DEFAULT_NAME, default: Optional[Any] = None) -> None: ...
+    def __init__(self, name: str = DEFAULT_NAME, default: Optional[Any] = None, *, strict: bool = False) -> None: ...
     def __getattr__(self, item: str) -> ConfigurationOption: ...
     def __getitem__(self, item: Union[str, Provider]) -> ConfigurationOption: ...
     def get_name(self) -> str: ...
diff --git a/src/dependency_injector/providers.pyx b/src/dependency_injector/providers.pyx
index 9ab3b9d6..d996533c 100644
--- a/src/dependency_injector/providers.pyx
+++ b/src/dependency_injector/providers.pyx
@@ -1172,10 +1172,11 @@ cdef class ConfigurationOption(Provider):
 
     UNDEFINED = object()
 
-    def __init__(self, name, root):
+    def __init__(self, name, root, required=False):
         self.__name = name
         self.__root_ref = weakref.ref(root)
         self.__children = {}
+        self.__required = required
         self.__cache = self.UNDEFINED
         super().__init__()
 
@@ -1193,7 +1194,7 @@ cdef class ConfigurationOption(Provider):
         if copied_root is None:
             copied_root = deepcopy(root, memo)
 
-        copied = self.__class__(copied_name, copied_root)
+        copied = self.__class__(copied_name, copied_root, self.__required)
         copied.__children = deepcopy(self.__children, memo)
 
         return copied
@@ -1229,7 +1230,7 @@ cdef class ConfigurationOption(Provider):
             return self.__cache
 
         root = self.__root_ref()
-        value = root.get(self._get_self_name())
+        value = root.get(self._get_self_name(), self.__required)
         self.__cache = value
         return value
 
@@ -1258,6 +1259,12 @@ cdef class ConfigurationOption(Provider):
     def as_(self, callback, *args, **kwargs):
         return TypedConfigurationOption(callback, self, *args, **kwargs)
 
+    def required(self):
+        return self.__class__(self.__name, self.__root_ref(), required=True)
+
+    def is_required(self):
+        return self.__required
+
     def override(self, value):
         if isinstance(value, Provider):
             raise Error('Configuration option can only be overridden by a value')
@@ -1396,9 +1403,11 @@ cdef class Configuration(Object):
     """
 
     DEFAULT_NAME = 'config'
+    UNDEFINED = object()
 
-    def __init__(self, name=DEFAULT_NAME, default=None):
+    def __init__(self, name=DEFAULT_NAME, default=None, strict=False):
         self.__name = name
+        self.__strict = strict
 
         value = {}
         if default is not None:
@@ -1416,7 +1425,7 @@ cdef class Configuration(Object):
         if copied is not None:
             return copied
 
-        copied = self.__class__(self.__name, self.__provides)
+        copied = self.__class__(self.__name, self.__provides, self.__strict)
         memo[id(self)] = copied
 
         copied.__children = deepcopy(self.__children, memo)
@@ -1450,12 +1459,15 @@ cdef class Configuration(Object):
     def get_name(self):
         return self.__name
 
-    def get(self, selector):
+    def get(self, selector, required=False):
         """Return configuration option.
 
         :param selector: Selector string, e.g. "option1.option2"
         :type selector: str
 
+        :param required: Required flag, raise error if required option is missing
+        :type required: bool
+
         :return: Option value.
         :rtype: Any
         """
@@ -1467,9 +1479,12 @@ cdef class Configuration(Object):
 
         while len(keys) > 0:
             key = keys.pop(0)
-            value = value.get(key)
-            if value is None:
-                break
+            value = value.get(key, self.UNDEFINED)
+
+            if value is self.UNDEFINED:
+                if self.__strict or required:
+                    raise Error('Undefined configuration option "{0}.{1}"'.format(self.__name, selector))
+                return None
 
         return value
 
diff --git a/src/dependency_injector/wiring.py b/src/dependency_injector/wiring.py
index b8143bba..9318b654 100644
--- a/src/dependency_injector/wiring.py
+++ b/src/dependency_injector/wiring.py
@@ -157,6 +157,9 @@ class ProvidersMap:
             else:
                 new = getattr(new, segment)
 
+        if original.is_required():
+            new = new.required()
+
         if as_:
             new = new.as_(as_)
 
diff --git a/tests/typing/configuration.py b/tests/typing/configuration.py
index 8344b5ac..3af454c4 100644
--- a/tests/typing/configuration.py
+++ b/tests/typing/configuration.py
@@ -21,3 +21,7 @@ config3 = providers.Configuration()
 int3: providers.Callable[int] = config3.option.as_int()
 float3: providers.Callable[float] = config3.option.as_float()
 int3_custom: providers.Callable[int] = config3.option.as_(int)
+
+# Test 4: to check required() method
+config4 = providers.Configuration()
+option4: providers.ConfigurationOption = config4.option.required()
diff --git a/tests/unit/providers/test_configuration_py2_py3.py b/tests/unit/providers/test_configuration_py2_py3.py
index bfd0796e..e3099d4b 100644
--- a/tests/unit/providers/test_configuration_py2_py3.py
+++ b/tests/unit/providers/test_configuration_py2_py3.py
@@ -97,6 +97,39 @@ class ConfigTests(unittest.TestCase):
 
         self.assertEqual(value, decimal.Decimal('123.123'))
 
+    def test_required(self):
+        provider = providers.Callable(
+            lambda value: value,
+            self.config.a.required(),
+        )
+        with self.assertRaisesRegex(errors.Error, 'Undefined configuration option "config.a"'):
+            provider()
+
+    def test_required_defined_none(self):
+        provider = providers.Callable(
+            lambda value: value,
+            self.config.a.required(),
+        )
+        self.config.from_dict({'a': None})
+        self.assertIsNone(provider())
+
+    def test_required_no_side_effect(self):
+        _ = providers.Callable(
+            lambda value: value,
+            self.config.a.required(),
+        )
+        self.assertIsNone(self.config.a())
+
+    def test_required_as_(self):
+        provider = providers.List(
+            self.config.int_test.required().as_int(),
+            self.config.float_test.required().as_float(),
+            self.config._as_test.required().as_(decimal.Decimal),
+        )
+        self.config.from_dict({'int_test': '1', 'float_test': '2.0', '_as_test': '3.0'})
+
+        self.assertEqual(provider(), [1, 2.0, decimal.Decimal('3.0')])
+
     def test_providers_value_override(self):
         a = self.config.a
         ab = self.config.a.b
@@ -176,6 +209,16 @@ class ConfigTests(unittest.TestCase):
     def test_value_of_undefined_option(self):
         self.assertIsNone(self.config.a())
 
+    def test_value_of_undefined_option_in_strict_mode(self):
+        self.config = providers.Configuration(strict=True)
+        with self.assertRaisesRegex(errors.Error, 'Undefined configuration option "config.a"'):
+            self.config.a()
+
+    def test_value_of_defined_none_option_in_strict_mode(self):
+        self.config = providers.Configuration(strict=True)
+        self.config.from_dict({'a': None})
+        self.assertIsNone(self.config.a())
+
     def test_getting_of_special_attributes(self):
         with self.assertRaises(AttributeError):
             self.config.__name__
diff --git a/tests/unit/samples/wiringsamples/module.py b/tests/unit/samples/wiringsamples/module.py
index 18241a02..01031d2d 100644
--- a/tests/unit/samples/wiringsamples/module.py
+++ b/tests/unit/samples/wiringsamples/module.py
@@ -43,11 +43,30 @@ def test_function_provider(service_provider: Callable[..., Service] = Provider[C
 
 @inject
 def test_config_value(
-        some_value_int: int = Provide[Container.config.a.b.c.as_int()],
-        some_value_str: str = Provide[Container.config.a.b.c.as_(str)],
-        some_value_decimal: Decimal = Provide[Container.config.a.b.c.as_(Decimal)],
+        value_int: int = Provide[Container.config.a.b.c.as_int()],
+        value_str: str = Provide[Container.config.a.b.c.as_(str)],
+        value_decimal: Decimal = Provide[Container.config.a.b.c.as_(Decimal)],
+        value_required: str = Provide[Container.config.a.b.c.required()],
+        value_required_int: int = Provide[Container.config.a.b.c.required().as_int()],
+        value_required_str: str = Provide[Container.config.a.b.c.required().as_(str)],
+        value_required_decimal: str = Provide[Container.config.a.b.c.required().as_(Decimal)],
 ):
-    return some_value_int, some_value_str, some_value_decimal
+    return (
+        value_int,
+        value_str,
+        value_decimal,
+        value_required,
+        value_required_int,
+        value_required_str,
+        value_required_decimal,
+    )
+
+
+@inject
+def test_config_value_required_undefined(
+        value_required: int = Provide[Container.config.a.b.c.required()],
+):
+    return value_required
 
 
 @inject
diff --git a/tests/unit/wiring/test_wiring_py36.py b/tests/unit/wiring/test_wiring_py36.py
index 9974066e..1972b8bc 100644
--- a/tests/unit/wiring/test_wiring_py36.py
+++ b/tests/unit/wiring/test_wiring_py36.py
@@ -2,6 +2,7 @@ from decimal import Decimal
 import unittest
 
 from dependency_injector.wiring import wire, Provide, Closing
+from dependency_injector import errors
 
 # Runtime import to avoid syntax errors in samples on Python < 3.5
 import os
@@ -109,10 +110,28 @@ class WiringTest(unittest.TestCase):
         self.assertIs(service, test_service)
 
     def test_configuration_option(self):
-        int_value, str_value, decimal_value = module.test_config_value()
-        self.assertEqual(int_value, 10)
-        self.assertEqual(str_value, '10')
-        self.assertEqual(decimal_value, Decimal(10))
+        (
+            value_int,
+            value_str,
+            value_decimal,
+            value_required,
+            value_required_int,
+            value_required_str,
+            value_required_decimal,
+        ) = module.test_config_value()
+
+        self.assertEqual(value_int, 10)
+        self.assertEqual(value_str, '10')
+        self.assertEqual(value_decimal, Decimal(10))
+        self.assertEqual(value_required, 10)
+        self.assertEqual(value_required_int, 10)
+        self.assertEqual(value_required_str, '10')
+        self.assertEqual(value_required_decimal, Decimal(10))
+
+    def test_configuration_option_required_undefined(self):
+        self.container.config.reset_override()
+        with self.assertRaisesRegex(errors.Error, 'Undefined configuration option "config.a.b.c"'):
+            module.test_config_value_required_undefined()
 
     def test_provide_provider(self):
         service = module.test_provide_provider()