code: def _retry_get(self, uri):
          
          for i in six.moves.range(DEFAULT_RETRY):
              resp, body = self.api.method_get(uri)
              if body:
                  return resp, body
          # Tried too many times
          raise exc.ServiceResponseFailure("The Cloud DNS service failed to "
                  "respond to the request.")
docs: Handles GET calls to the Cloud DNS API in order to retry on empty
          body responses.