code: def get_json_encoders_for_type(self, type_to_encode: type) -> Optional[Iterable[JSONEncoder]]:
          
          if type_to_encode not in self._json_encoders:
              return None
          return self._json_encoders[type_to_encode]
docs: Gets the registered JSON encoder for the given type.
          :param type_to_encode: the type of object that is to be encoded
          :return: the encoder for the given object else `None` if unknown