code: def update_instances(old, new):
      """Use garbage collector to find all instances that refer to the old
      class definition and update their __class__ to point to the new class
      definition"""
  
      refs = gc.get_referrers(old)
  
      for ref in refs:
          if type(ref) is old:
              object.__setattr__(ref, "__class__", new)
  
imports: from IPython.core import magic_arguments
  from IPython.core.magic import Magics, magics_class, line_magic
  import os
  import sys
  import traceback
  import types
  import weakref
  import gc
  import logging
  from importlib import import_module, reload
  from importlib.util import source_from_cache
label_desc: Use image node_id 2 for calling a global function with example usage: update_instances(old, new) without return types