sclass JG22Label > SingleComponentPanel {
  G22Label label;
  
  JLabel jLabel;
  JTextField tf;
  
  *() { init(); }
  *(JG22Label label) { init(); }
  
  void init {
    if (label == null)
      setComponent(tf = jTextField());
    else
      setComponent(jLabel = jLabel(label.name));
  }
}