private void selectScope(String preselect) {
   if (preselect != null) {
     final JComboBox combo = getComboBox();
     DefaultComboBoxModel model = (DefaultComboBoxModel) combo.getModel();
     for (int i = 0; i < model.getSize(); i++) {
       ScopeDescriptor descriptor = (ScopeDescriptor) model.getElementAt(i);
       if (preselect.equals(descriptor.getDisplay())) {
         combo.setSelectedIndex(i);
         break;
       }
     }
   }
 }
 @Override
 public void customize(
     JList list, ScopeDescriptor value, int index, boolean selected, boolean hasFocus) {
   setText(value.getDisplay());
   if (value instanceof ScopeSeparator) {
     setSeparator();
   }
 }