// action can be Runnable or a function name
static JButton jThreadedButton(fS text, fO action) {
  ret swing(func -> JButton {
    S text2 = dropPrefix("[disabled] ", text);
    final JButton btn = new JButton(text2);
    if (l(text2) < l(text)) btn.setEnabled(false);
    btn.setToolTipText(btn.getText());
    if (action != null)
      btn.addActionListener(actionListenerInNewThread(action, btn));
    ret btn;
  });
}