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