def _last_index(self, s):
        self.set_index(max(0, self._find_one_after_last_labeled_index() - 1))
def parsed_error_msg(self):
        """
        Sometimes, the error message we've received needs to be parsed into
        something more human readable

        The default behavior is to return the current error message as is.
        """
        return self.error_msg