code: def _track_handler(handler):
      handlers.add(handler)
      return handler
  
imports: import functools
  import itertools
  import logging
  import os
  import re
  from dataclasses import dataclass, field
  from importlib import __import__
  from typing import Dict, List, Optional, Set, Union
  from weakref import WeakSet
  import torch._guards
  import torch.distributed
label_desc: Use image node_id 17 for calling a global function with example usage: _track_handler(handler) and returns: handler