code: def decode_dict(value_fields, client):
      
      return {
          key: decode_value(value, client) for key, value in six.iteritems(value_fields)
      }
docs: Converts a protobuf map of Firestore ``Value``-s.
  
      Args:
          value_fields (google.protobuf.pyext._message.MessageMapContainer): A
              protobuf map of Firestore ``Value``-s.
          client (~.firestore_v1beta1.client.Client): A client that has
              a document factory.
  
      Returns:
          Dict[str, Union[NoneType, bool, int, float, datetime.datetime, \
              str, bytes, dict, ~google.cloud.Firestore.GeoPoint]]: A dictionary
          of native Python values converted from the ``value_fields``.