code: def _lookup_class_or_track(class_tracker_id, class_def):
      if class_tracker_id is not None:
          with _DYNAMIC_CLASS_TRACKER_LOCK:
              class_def = _DYNAMIC_CLASS_TRACKER_BY_ID.setdefault(
                  class_tracker_id, class_def
              )
              _DYNAMIC_CLASS_TRACKER_BY_CLASS[
                  class_def
              ] = class_tracker_id
      return class_def
  
imports: from __future__ import print_function
  from __future__ import division
  from __future__ import absolute_import
  import builtins
  import dis
  import opcode
  import platform
  import sys
  import types
  import weakref
  import uuid
  import threading
  import typing
  import warnings
  from ._compat import pickle
  from typing import Generic, Union, Tuple, Callable
  from pickle import _getattribute
  from importlib._bootstrap import _find_spec
label_desc: Use image node_id 2 for calling a global function with example usage: _lookup_class_or_track(class_tracker_id, class_def) and returns: class_def