public void show(com.vaadin.shared.Position position) {
show(position, null);
}
public void show(Widget widget, Position position, String style) {
NotificationTypeConfiguration styleSetup = getUiState(style);
setWaiAriaRole(styleSetup);
FlowPanel panel = new FlowPanel();
if (hasPrefix(styleSetup)) {
panel.add(new Label(styleSetup.prefix));