code: def ip_messaging(self):
          
          if self._ip_messaging is None:
              from twilio.rest.ip_messaging import IpMessaging
              self._ip_messaging = IpMessaging(self)
          return self._ip_messaging
docs: Access the IpMessaging Twilio Domain
  
          :returns: IpMessaging Twilio Domain
          :rtype: twilio.rest.ip_messaging.IpMessaging