final ListBox pats = this.loadBoundFacts();
pop.addAttribute( GuidedDecisionTableConstants.INSTANCE.ChooseFact(),
pats );
Button ok = new Button( GuidedDecisionTableConstants.INSTANCE.OK() );
pop.addAttribute( "",
ok );
ok.addClickHandler( new ClickHandler() {
public void onClick( ClickEvent w ) {
String val = pats.getValue( pats.getSelectedIndex() );