code: def nop_ctx_mgr():
      try:
          yield None
      finally:
          pass
  
imports: import unittest
  from torch._lazy.ts_backend import init
  from torch._lazy import config
  from torch._lazy.extract_compiled_graph import extract_compiled_graph
  import torch
  from torch import nn
  import dis
  import inspect
  from torch import fx
  import re
  from contextlib import contextmanager
  import copy
label_desc: Use image node_id 2 for calling a global function with example usage: nop_ctx_mgr() without return types