class NIOServerCnxn extends ServerCnxn {

    @Override
    protected ServerStats serverStats() {
        if (zkServer == null) {
            return null;
        }
        return zkServer.serverStats();
    }

    public  NIOServerCnxn(ZooKeeperServer zk, SocketChannel sock,
                         SelectionKey sk, NIOServerCnxnFactory factory,
                         SelectorThread selectorThread);

}