def add_on_results(self):
        """
        Access the add_on_results

        :returns: twilio.rest.api.v2010.account.recording.add_on_result.AddOnResultList
        :rtype: twilio.rest.api.v2010.account.recording.add_on_result.AddOnResultList
        """
        if self._add_on_results is None:
            self._add_on_results = AddOnResultList(
                self._version,
                account_sid=self._solution['account_sid'],
                reference_sid=self._solution['sid'],
            )
        return self._add_on_results
Access the add_on_results

        :returns: twilio.rest.api.v2010.account.recording.add_on_result.AddOnResultList
        :rtype: twilio.rest.api.v2010.account.recording.add_on_result.AddOnResultList