Connect to the echo WebSocket server

main.dart

class MyHomePage extends StatefulWidget {
  WebSocketChannel channel = IOWebSocketChannel.connect("wss://ws.ifelse.io/");

  @override
  MyHomePageState createState() {
    return MyHomePageState();
  }
}
class MyHomePageState extends State<MyHomePage> {
  TextEditingController _controller = TextEditingController();
  @override
  Widget build(BuildContext context) {
   //.....same code as gist (1)