code: def get_config(self):
      return self._dataset_config
  
file_path: mmf/mmf/common/dataset_loader.py
imports: import warnings
  from mmf.common.sample import SampleList
  from mmf.datasets.multi_dataset_loader import MultiDatasetLoader
  from mmf.utils.build import build_multiple_datamodules, build_test_reporter
label_desc: Use image node_id 5 for calling the DatasetLoader obj's underlying member method code with example usage: obj.get_config() and returns: self