Return a new instance of query_cls.

def query(self):
        """Return a new instance of query_cls."""

        if not hasattr(self, '_decoded_query'):
            self._decoded_query = list(urls._url_decode_impl(
                self.querystr.split('&'), 'utf-8', False, True, 'strict'))
        return self.query_cls(self._decoded_query)