code: def _make_fake_extensions(seed: int) -> List[str]:
      random.seed(seed)
      fake_extensions = []
      for i in range(5):
          idxs = random.randint(0, len(ascii_lowercase), size=3)
          fake_extensions.append(
              "".join(["."] + [ascii_lowercase[idx] for idx in idxs])
          )
      return fake_extensions
  
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 3 for calling a global function with example usage: _make_fake_extensions(seed) and returns: fake_extensions