code: def _return_instance(cls):
      """Function that returns a instance of cls."""
      return cls()
  
imports: import contextlib
  import queue
  import signal
  import sys
  import time
  import unittest
  import unittest.mock
  from pickle import PicklingError
  from concurrent import futures
  from concurrent.futures.process import BrokenProcessPool, _ThreadWakeup
  from test import support
  from .util import create_executor_tests, setup_module, ProcessPoolForkMixin, ProcessPoolForkserverMixin, ProcessPoolSpawnMixin
label_desc: Use image node_id 6 for calling a global function with example usage: _return_instance(cls) and returns: cls