code: public void selfUnregister() {
          LocalUnitsManager.searchUnitMap(searchUnitMap ->
                  searchUnitMap.forEach((unitFullName, unit) -> {
                      try {
                          ServiceInstance<UnitProxy> thisInstance = ZkServiceInstanceAdaptor.thisCuratorServiceInstance(unit);
                          serviceDiscovery.unregisterService(thisInstance);
                      } catch (Throwable e) {
                          LOG.error(e);//别打断循环内其他操作
                      }
                  }));
      }
docs: 注销本节点内所有unit实例