code: def _get_mr_params(self):
      
      return {"force_writes": self._force_writes,
              "done_callback": self.done_callback_url,
              "user_params": self.user_params,
              "shard_max_attempts": self.shard_max_attempts,
              "task_max_attempts": self._task_max_attempts,
              "task_max_data_processing_attempts":
                  self._task_max_data_processing_attempts,
              "queue_name": self.queue_name,
              "base_path": self._base_path,
              "app_id": self._app,
              "api_version": self._api_version}
docs: Converts self to model.MapreduceSpec.params.