Update src/diffusers/configuration_utils.py

Co-authored-by: Lucain <[email protected]>

Author: SunMarc

src/diffusers/configuration_utils.py

@@ -560,7 +560,7 @@ def extract_init_dict(cls, config_dict, **kwargs):
         return init_dict, unused_kwargs, hidden_config_dict
 
     @classmethod
-    def _dict_from_json_file(cls, json_file: Union[str, os.PathLike], dduf_entries=None):
+    def _dict_from_json_file(cls, json_file: Union[str, os.PathLike], dduf_entries: Optional[Dict[str, DDUFEntry]] = None):
         if dduf_entries:
             text = dduf_entries[json_file].read_text()
         else: