public ByteSequence bytesOf(final String val) {
        return ByteSequence.from(val, UTF_8);
    }
bytesOf string.
@param val val.
@return bytes val.
shenyu-sync-data-center/shenyu-sync-data-etcd/src/main/java/org/apache/shenyu/sync/data/etcd/EtcdClient.java