code: def __CreateVoidResponseType(self, method_description):
          
          schema = {}
          method_name = self.__names.ClassName(
              method_description['id'], separator='.')
          schema['id'] = self.__names.ClassName('%sResponse' % method_name)
          schema['type'] = 'object'
          schema['description'] = 'An empty %s response.' % method_name
          self.__message_registry.AddDescriptorFromSchema(schema['id'], schema)
          return schema['id']
docs: Create an empty response type.