Highlight.showOnly(connector);
((Widget) event.getSource()).getElement().getStyle()
.setTextDecoration(TextDecoration.UNDERLINE);
}
}, MouseOverEvent.getType());
errorNode.addDomHandler(new MouseOutHandler() {
@Override
public void onMouseOut(MouseOutEvent event) {
Highlight.hideAll();
((Widget) event.getSource()).getElement().getStyle()
.setTextDecoration(TextDecoration.NONE);