docs: def find_furious_yaml(config_file=__file__):
      """
      Traverse directory trees to find a furious.yaml file
  
      Begins with the location of this file then checks the
      working directory if not found
  
      Args:
          config_file: location of this file, override for
          testing
      Returns:
          the path of furious.yaml or None if not found
      """
      checked = set()
      result = _find_furious_yaml(os.path.dirname(config_file), checked)
      if not result:
          result = _find_furious_yaml(os.getcwd(), checked)
      return result