code: def test_get_file_content_from_dataset_folder_return_none(
      mock_get_path,
  ):
      mock_get_path.return_value = FileNotFoundError
      actual = dcb.get_file_content_from_dataset_folder(
          dataset_class=None, file_name=None
      )
      assert actual is None
  
file_path: datasets/tensorflow_datasets/core/dataset_collection_builder_test.py
imports: from unittest import mock
  from etils import epath
  import pytest
  from tensorflow_datasets import testing
  from tensorflow_datasets.core import dataset_collection_builder
  from tensorflow_datasets.core.utils import version
label_desc: Use image node_id 3 for calling a global function with example usage: test_get_file_content_from_dataset_folder_return_none(mock_get_path) without return types