Maek Resoyrce.Key as (mostly) internal

diff --git a/resources/resource/resourcetypes.go b/resources/resource/resourcetypes.go
index 7a735dca5c986a803ea05a574adf81c074793b96..6b437023ab8dedc60b844b9e225c27a743b13618 100644 (file)
--- a/resources/resource/resourcetypes.go
+++ b/resources/resource/resourcetypes.go
@@ -166,6 +166,8 @@ type ResourcesLanguageMerger interface {
 
 // Identifier identifies a resource.
 type Identifier interface {
+       // Key is is mostly for internal use and should be considered opaque.
+       // This value may change between Hugo versions.
        Key() string
 }