srecord noeq ComboBoxAndButton(JComboBox cb, S buttonText, IVF1<S> onEnter) {
  JButton btn;
  
  Runnable makeAction() {
    ret -> pcallF(onEnter, getText(cb));
  }
  
  swappable JComponent wrapButton(JComponent button) { ret button; }
  
  JComponent makePanel() {
    ret centerAndEastWithMargin(cb, wrapButton(btn));
  }
  
  JComponent get() {
    Runnable r = makeAction();
    onEnter(cb, r);
    btn = jbutton(buttonText, r);
    ret makePanel();
  }
}