Java-Netty.5.0.0.Alpha2无法重现符号

Question

...
try{
            Bootstrap bootstrap = new Bootstrap()
                    .group(group)
                    .channel(NioSocketChannel.class)
                    .handler(new ChatClientInitializer());
            Channel channel = new bootstrap.connect(host, port).sync().channel();
...}

只是说无法解决符号＆＃34;连接＆＃34;，出了什么问题？