code: def get_where_defined(key: str) -> str:
      """Indicate where (e.g. in which file) this option was defined.
  
      Parameters
      ----------
      key : str
          The config option key of the form "section.optionName"
  
      """
      with _config_lock:
          config_options = get_config_options()
  
          if key not in config_options:
              raise RuntimeError('Config key "%s" not defined.' % key)
          return config_options[key].where_defined
  
imports: import copy
  import os
  import secrets
  import threading
  from collections import OrderedDict
  from typing import Any, Callable, Dict, Optional, cast
  import toml
  from blinker import Signal
  from streamlit import config_util, development, env_util, file_util, util
  from streamlit.config_option import ConfigOption
  from streamlit.errors import StreamlitAPIException
label_desc: Use image node_id 15 for calling a global function with example usage: get_where_defined(key) and returns: config_options