code: def enable_svc_notifications(self, service):
          
          if not service.notifications_enabled:
              service.modified_attributes |= \
                  DICT_MODATTR["MODATTR_NOTIFICATIONS_ENABLED"].value
              service.notifications_enabled = True
              self.send_an_element(service.get_update_status_brok())
docs: Enable notifications for a service
          Format of the line that triggers function call::
  
          ENABLE_SVC_NOTIFICATIONS;<host_name>;<service_description>
  
          :param service: service to edit
          :type service: alignak.objects.service.Service
          :return: None