def __response_message_descriptor(self, message_type, method_id):
<EOL>descriptor = {'<STR_LIT>': {'<STR_LIT:description>': '<STR_LIT>'}}<EOL>if message_type != message_types.VoidMessage():<EOL><INDENT>self.__parser.add_message(message_type.__class__)<EOL>self.__response_schema[method_id] = self.__parser.ref_for_message_type(<EOL>message_type.__class__)<EOL>descriptor['<STR_LIT>']['<STR_LIT>'] = {'<STR_LIT>': '<STR_LIT>'.format(<EOL>self.__response_schema[method_id])}<EOL><DEDENT>return dict(descriptor)<EOL>
Describes the response.

        Args:
          message_type: messages.Message class, The message to describe.
          method_id: string, Unique method identifier (e.g. 'myapi.items.method')

        Returns:
          Dictionary describing the response.