code: def _make_mock_dir(root, mock_files: List) -> List[PATH_TYPE]:
      mockdir = []
      for idx, f_ext in enumerate(mock_files):
          mockdir.append(os.path.join(root, mock_files[idx]))
      return mockdir
  
file_path: lightning-flash/tests/core/data/utilities/test_paths.py
imports: import os
  import warnings
  from string import ascii_lowercase
  from typing import List
  import pytest
  from flash.core.data.utilities.loading import AUDIO_EXTENSIONS, IMG_EXTENSIONS, NP_EXTENSIONS
  from flash.core.data.utilities.paths import PATH_TYPE, filter_valid_files
  from numpy import random
label_desc: Use image node_id 1 for calling a global function with example usage: _make_mock_dir(root, mock_files) and returns: mockdir