diff --git a/lib/go/camli/blobref/fetcher.go b/lib/go/camli/blobref/fetcher.go
index 0fa52033a..759819fc0 100644
--- a/lib/go/camli/blobref/fetcher.go
+++ b/lib/go/camli/blobref/fetcher.go
@@ -30,6 +30,9 @@ import (
 
 var _ = log.Printf
 
+// TODO: rename StreamingFetcher to be Fetch (the common case) and
+// make a new interface for SeekingFetcher (the rare case)
+
 type Fetcher interface {
 	// Fetch returns a blob.  If the blob is not found then
 	// os.ENOENT should be returned for the error (not a wrapped