@Override
    public void unWatchInstances(final String key) {
        if (watchCache.containsKey(key)) {
            watchCache.get(key).forEach(Watch.Watcher::close);
            watchCache.removeAll(key);
            LOGGER.info("etcd Unwatched etcd key: {}", key);
        }
    }
The type Etcd instance register repository.
shenyu-registry/shenyu-registry-etcd/src/main/java/org/apache/shenyu/registry/etcd/EtcdInstanceRegisterRepository.java