code: def notifications(self):
          
          if self._notifications is None:
              self._notifications = NotificationList(self._version, account_sid=self._solution['sid'], )
          return self._notifications
docs: Access the notifications
  
          :returns: twilio.rest.api.v2010.account.notification.NotificationList
          :rtype: twilio.rest.api.v2010.account.notification.NotificationList