docs: def configparser(self):
          """
          Adapter to dump/load INI format strings and files using standard library's
          ``ConfigParser`` (or the backported configparser module in Python 2).
          
          Returns:
              ConfigPersistenceAdapter
          """
          if self._configparser_adapter is None:
              self._configparser_adapter = ConfigPersistenceAdapter(
                  config=self,
                  reader_writer=ConfigParserReaderWriter(
                      config_parser_factory=self.settings.configparser_factory,
                  ),
              )
          return self._configparser_adapter