@Override
public void onUnregister() {
LayoutManager lm = getLayoutManager();
VWindow window = getWidget();
lm.unregisterDependency(this, window.contentPanel.getElement());
lm.unregisterDependency(this, window.header);
lm.unregisterDependency(this, window.footer);
}
@Override
public void updateFromUIDL(UIDL uidl, ApplicationConnection client) {