code: def __call__(self, *args, **kwargs):
      return None, None
  
file_path: mmocr/tests/test_datasets/test_preparers/test_data_preparer.py
imports: import os.path
  import unittest
  from mmengine import Config
  from mmocr.datasets.preparers import DatasetPreparer
  from mmocr.datasets.preparers.data_preparer import CFG_GENERATORS, DATA_DUMPERS, DATA_GATHERERS, DATA_OBTAINERS, DATA_PACKERS, DATA_PARSERS
label_desc: Use image node_id 2 for calling the Fake obj's underlying member method code with example usage: obj.__call__() and returns: None,  None