Create the argparser_ for this configuration by adding all
        settings via the :meth:`Setting.add_argument` method.

        :rtype: an instance of :class:`ArgumentParser`.

def parser(self):
        """Create the argparser_ for this configuration by adding all
        settings via the :meth:`Setting.add_argument` method.

        :rtype: an instance of :class:`ArgumentParser`.
        """
        parser = argparse.ArgumentParser(description=self.description,
                                         epilog=self.epilog)
        parser.add_argument('--version',
                            action='version',
                            version=self.version)
        return self.add_to_parser(parser)