.getContainerPropertyIds().iterator().next());
}
} else if (c instanceof ComponentContainer) {
ComponentContainer new_name = (ComponentContainer) c;
new_name.addComponent(new Label("component 1 in test container"));
new_name.addComponent(new Button("component 2"));
} else if (c instanceof Embedded) {
Embedded em = (Embedded) c;
em.setSource(new ThemeResource("test.png"));
} else if (c instanceof Label) {