code: def test_automatic_thread_deletion() -> None:
      thread = recaster.MessagingThread(fake_caller)
      assert thread.is_alive()
  
imports: import pickle
  import numpy
  import pytest
  import nevergrad
  import nevergrad.common.typing
  from nevergrad.functions import ArtificialFunction
  from nevergrad.benchmark import experiments
  from nevergrad.benchmark.xpbase import Experiment
  from .None import recaster
  from .None import optimizerlib
label_desc: Use image node_id 2 for calling a global function with example usage: test_automatic_thread_deletion() without return types