static void inputText(fS msg, fO action) {
  inputText(msg, "", action);
}

// action: voidfunc(S)
static void inputText(fS msg, final S defaultText, fO action) {
  awt {
    final JTextField tf = jtextfield(defaultText);
    S title = joinStrings(" | ", msg, programName());
    JComponent form = showFormTitled(title,
      unnull(msg), tf,
      r {
        callF_thread(action, getTextTrim(tf))
      });
    renameSubmitButton(form, "OK");
    vmBus_send('inputtingText, _threadInfo(), msg, tf);
  }
}