code: def _get_registered_option(key: str):
      """
      Retrieves the option metadata if `key` is a registered option.
  
      Returns
      -------
      RegisteredOption (namedtuple) if key is deprecated, None otherwise
      """
      return _registered_options.get(key)
  
imports: from __future__ import annotations
  from contextlib import ContextDecorator, contextmanager
  import re
  from typing import TYPE_CHECKING, Any, Callable, Generic, NamedTuple, cast
  import warnings
  from pandas._typing import F, T
  from pandas.util._exceptions import find_stack_level
label_desc: Use image node_id 13 for calling a global function with example usage: _get_registered_option(key) and returns: _registered_options