code: def _check_response_for_request_warnings(self):
          
  
          if self.response.HighestSeverity in ("NOTE", "WARNING"):
              for notification in self.response.Notifications:
                  if notification.Severity in ("NOTE", "WARNING"):
                      self.logger.warning(FedexFailure(notification.Code,
                                                       notification.Message))
docs: Override this in a service module to check for errors that are
          specific to that module. For example, changing state/province based
          on postal code in a Rate Service request.