code: def data_chunk_fixture(request):
      return _update_data_chunk(getattr(request, "param", dict()))
  
file_path: hyperparameter_hunter/tests/test_data/test_data_core.py
imports: from hyperparameter_hunter.data.data_core import BaseDataChunk, BaseDataset, NullDataChunk
  import pandas
  import pytest
  from unittest import mock
label_desc: Use image node_id 7 for calling a global function with example usage: data_chunk_fixture(request) and returns: _update_data_chunk