LayoutPanel rhs = new LayoutPanel();
rhs.setStyleName("fill-layout");
MessageCenterView messageCenterView = new MessageCenterView(messageCenter);
Widget messageCenter = messageCenterView.asWidget();
rhs.add(messageCenter);
rhs.add(links);
rhs.setWidgetRightWidth(messageCenter, 10, Style.Unit.PX, 100, Style.Unit.PCT);
rhs.setWidgetRightWidth(links, 10, Style.Unit.PX, 100, Style.Unit.PCT);