static JLabel showSuggestion_current;

// runs action in new thread
svoid showSuggestion(S suggestionText, fO action) {
  int fontSize = 20, buttonFontSize = 15;
  final JLabel label = fontSize(fontSize, jCenteredMultiLineLabel(suggestionText));
  showSuggestion_current = showPackedFrameInBottomRightCorner(
    withLineBorder(Color.black, withMargin(
      centerAndSouth(
        label,
        withTopMargin(makeFirstButtonBold(fontSizeAll(buttonFontSize, jcenteredbuttons(
          "OK", r {
            hideSuggestion(label);
            callFInNewThread(action);
          }, "No", r { hideSuggestion(label) }))))))));
}