final class DeleteContextMenu extends Menu{
public DeleteContextMenu(String menuText, String menuIcon, final Record record, final int colindex, final ValueType valueType) {
MenuItem item = new MenuItem();
item.setText(menuText);
item.setIcon(menuIcon);
item.addListener(new BaseItemListenerAdapter() {
@Override
public void onClick(BaseItem item, EventObject e) {
super.onClick(item, e);
String field = record.getFields()[colindex];
record.set(field, (String)null);