def METHOD_NAME(self, train_data_config: Optional[DictConfig]):
    if not train_data_config or not train_data_config.data_file:
        logging.info(
            f"Dataloader config or file_path or processed data path for the train dataset is missing, \
                    so no data loader for train is created!"
        )
        self._train_dl = None
        return
    self._train_dl = self.setup_dataloader(cfg=train_data_config)