class_docstr: Dict-like container for Extension fields on proto instances.
  
  Note that in all cases we expect extension handles to be
  FieldDescriptors.
class_docstr_tok: ["Dict-like","container","for","Extension","fields","on","proto","instances",".","Note","that","in","all","cases","we","expect","extension","handles","to","be","FieldDescriptors","."]
docstr: Args:
    extended_message: Message instance for which we are the Extensions dict.
docstr_tok: ["Args",":","extended_message",":","Message","instance","for","which","we","are","the","Extensions","dict","."]
code: def __init__(self, extended_message):
      """
      Args:
        extended_message: Message instance for which we are the Extensions dict.
      """
      self._extended_message = extended_message
  
file_path: catboost/contrib/python/protobuf/py3/google/protobuf/internal/extension_dict.py
imports: from google.protobuf.internal import type_checkers
  from google.protobuf.descriptor import FieldDescriptor
label_desc: Use image node_id 1 to create a new _ExtensionDict object from inherited base classes: object with example: obj = _ExtensionDict(extended_message)