code: def __dir__(self):
      return list(self._config.keys())
  
imports: import contextlib
  import functools
  import operator
  import os
  import warnings
  import threading
  from copy import deepcopy
  from typing import Union, Dict
label_desc: Use image node_id 2 for calling the Config obj's underlying member method code with example usage: obj.__dir__() and returns: list