public List<String> subscribeChildrenChanges(final String key, final CuratorWatcher curatorWatcher) {
        try {
            return client.getChildren().usingWatcher(curatorWatcher).forPath(key);
        } catch (Exception e) {
            throw new ShenyuException(e);
        }
    }
add children watcher.
@param key selectKey
@param curatorWatcher watcher
@return children List
shenyu-registry/shenyu-registry-zookeeper/src/main/java/org/apache/shenyu/registry/zookeeper/ZookeeperClient.java