code: def get_worker_manager():
      manager = getattr(_WORKER_MANAGERS, "manager", None)
      if not manager:
          raise RuntimeError(
              "Worker manager is only available from a PyNode thread."
          )
      return manager
  
imports: import collections
  from concurrent import futures
  import dataclasses
  import functools
  import signal
  import subprocess
  import threading
  import time
  from typing import Any, Callable, Iterable, List, Mapping, MutableMapping, Optional, Sequence, Tuple
  from absl import logging
  from launchpad import flags
  import psutil
  import termcolor
label_desc: Use image node_id 4 for calling a global function with example usage: get_worker_manager() and returns: manager