docs: def get_config_bool_option(parser: ConfigParser,
                             section: str,
                             option: str,
                             default: bool = None) -> bool:
      """
      Retrieves a boolean value from a parser.
  
      Args:
          parser: instance of :class:`ConfigParser`
          section: section name within config file
          option: option (variable) name within that section
          default: value to return if option is absent
  
      Returns:
          string value
  
      Raises:
          ValueError: if the section is absent
  
      """
      if not parser.has_section(section):
          raise ValueError("config missing section: " + section)
      return parser.getboolean(section, option, fallback=default)