mapping_combo_.addItemListener(this);
  public AccessOptionPanel(DinomedaApplication application)  {    application_ = application;        setLayout(new GridLayout(4, 1));    setBorder(BorderFactory.createLoweredBevelBorder());    insets_ = new Insets(0, 10, 10, 10);            add(new JLabel("MIME type"));        mime_label_ = new JLabel();    add(mime_label_);        add(new JLabel("Name mapping"));        mapping_combo_ = new JComboBox();    add(mapping_combo_);  }