docs: def _ensure_config_file_exists():
      """
      Makes sure the config file exists.
  
      :raises: :class:`epab.core.new_config.exc.ConfigFileNotFoundError`
      """
      config_file = Path(ELIBConfig.config_file_path).absolute()
      if not config_file.exists():
          raise ConfigFileNotFoundError(ELIBConfig.config_file_path)