public void start() {
display.printHeader("This is pong chat", Style.title);
display.printHeader("You need to open the ping chat example page in order to run the example", Style.important);
new ChatManagerEventsSupervisor(chatManager, display);
chatManager.addChatChangedHandler(new ChatChangedHandler() {
@Override
public void onChatChanged(final ChatChangedEvent event) {
if (event.is(ChangeTypes.created)) {
final Chat chat = event.getChat();
listenToChat(chat);