// Could also add Input Field for new WebSocket channel with possibility
// to set Origin header to some custom value
this.messagePanel = messagePanel;
wsUiHelper = new WebSocketUiHelper();
wsUiHelper.setChannelsModel(channelsModel);
controlToolbar.add(wsUiHelper.getChannelLabel());
controlToolbar.add(wsUiHelper.getChannelSingleSelect());
wsUiHelper.getChannelSingleSelect().setSelectedIndex(0);