HelloWorldService helloWorldService= serviceFactory.createSyncService(HelloWorldService.class);
public void build()
{
final VisualLabel<String> label= new VisualLabelImpl<String>("message");
final VisualButton button= new VisualButtonImpl("button", new ClickListener()
{
public void clickPerformed(VisualComponent aVisualComponent)
{
label.setValue(helloWorldService.getGreetingsFor("World"));
}