code: def test_main():
      """Main function to be called within `__main__` of a test file."""
      global _test_main_called
      _test_main_called = True
  
      os.environ["TF_FORCE_GPU_ALLOW_GROWTH"] = "true"
  
      if _is_enabled():
          _set_spawn_exe_path()
          _if_spawn_run_and_exit()
  
      # Only runs test.main() if not spawned process.
      test.main()
  
file_path: tensorflow-upstream/tensorflow/python/distribute/multi_process_lib.py
imports: import multiprocessing
  import os
  import platform
  import sys
  import unittest
  from absl import app
  from absl import logging
  from tensorflow.python.eager import test
label_desc: Use image node_id 5 for calling a global function with example usage: test_main() without return types