code: def set_default(
      self,
      item: Any,
      value: Any = None,
      func: Optional[Callable] = None,
  ):
      if isinstance(item, ConfigItem):
          item = item.key
      else:
          warnings.warn(
              f"Use Config.{item} when setting defaults",
              FutureWarning,
              4,
          )
  
      self.__default_overrides[item] = (value, func)
  
imports: import types
  import warnings
  from collections import OrderedDict
  from typing import Dict, List, Callable, Union, Tuple, Optional, Type, Set, Iterable, Any
  from .config_function import ConfigFunction
  from .config_item import ConfigItem
  from .eval_function import EvalFunction
  from .utils import Value
  from ...None import monit
label_desc: Use image node_id 31 for calling the Configs obj's underlying member method code with example usage: obj.set_default(item, value, func) without return types