code: def _build_next_request(self, verb, prior_request, prior_response):
          
          method = getattr(self._component, verb + '_next')
          return method(prior_request, prior_response)
docs: Builds pagination-aware request object.
  
          More details:
            https://developers.google.com/api-client-library/python/guide/pagination
  
          Args:
              verb (str): Request verb (ex. insert, update, delete).
              prior_request (httplib2.HttpRequest): Request that may trigger
                  paging.
              prior_response (dict): Potentially partial response.
  
          Returns:
              httplib2.HttpRequest: HttpRequest or None. None is returned when
                  there is nothing more to fetch - request completed.