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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def _handle_is_dag_stopped(self, request):
 """ The handler for the dag_stopped request. The dag_stopped request checks whether a dag is flagged to be terminated. Args: request (Request):
 Reference to a request object containing the incoming request. The payload has to contain the following fields: 'dag_name': the name of the dag that should be checked Returns: Response: A response object containing the following fields: - is_stopped: True if the dag is flagged to be stopped. """

        return Response(success=True,
                        uid=request.uid,
                        payload={
                            'is_stopped': request.payload['dag_name'] in self._stop_dags
                        })