code: def fn():
      return True
  
imports: import threading
  import time
  from collections import Counter
  import gc
  from typing import Any, Optional, Type
  import pytest
  import ray
  from ray.air import ResourceRequest
  from ray.air.execution import FixedResourceManager, PlacementGroupResourceManager
  from ray.air.execution._internal import Barrier
  from ray.air.execution._internal.actor_manager import RayActorManager
label_desc: Use image node_id 4 for calling a global function with example usage: fn() and returns: True