OptionGroup layouts = new OptionGroup("Layouts", Arrays.asList(
"AbsoluteLayout", "OrderedLayout", "GridLayout"));
layouts.select("AbsoluteLayout");
layouts.setImmediate(true);
layouts.addValueChangeListener(new ValueChangeListener() {
@Override
public void valueChange(ValueChangeEvent event) {
if (event.getProperty().getValue().equals("AbsoluteLayout")) {
testAbsoluteLayout();
} else if (event.getProperty().getValue()