docs: def _get_config_instance(group_or_term, session, **kwargs):
      """ Finds appropriate config instance and returns it.
  
      Args:
          group_or_term (Group or Term):
          session (Sqlalchemy session):
          kwargs (dict): kwargs to pass to get_or_create.
  
      Returns:
          tuple of (Config, bool):
      """
      path = group_or_term._get_path()
      cached = group_or_term._top._cached_configs.get(path)
      if cached:
          config = cached
          created = False
      else:
          # does not exist or not yet cached
          config, created = get_or_create(session, Config, **kwargs)
      return config, created