private void showChangeFact( ClickEvent w ) {
final FormStylePopup pop = new FormStylePopup( GuidedDecisionTableConstants.INSTANCE.FactType() );
final ListBox pats = this.loadBoundFacts( editingCol.getBoundName() );
pop.addAttribute( GuidedDecisionTableConstants.INSTANCE.ChooseFact(),
pats );
pop.add( new ModalFooterOKCancelButtons( new Command() {
@Override
public void execute() {
String val = pats.getValue( pats.getSelectedIndex() );