static double showSuggestion_hideTime = 3.0;

// action is called in new thread
static JLabel showSuggestion_individual(fS suggestionText, fO action) {
  final int fontSize = 20, buttonFontSize = 15;
  final JLabel label = fontSize(fontSize, jCenteredMultiLineLabel(suggestionText));
  final VF1<JFrame> framePost = getThreadLocal(makeFrame_post);
  swing {
    makeFrame_post.set(or(framePost, vf1_frameAutoRequestFocusFalse()));
    JFrame f = alwaysOnTop(showPackedFrameInBottomRightCorner(
      withLineBorder(Color.black, withMargin(
        centerAndSouth(
          label,
          withTopMargin(makeFirstButtonBold(fontSizeAll(buttonFontSize, jcenteredbuttons(
            "OK", r {
              hideSuggestion(label);
              callFInNewThread(action);
            }, "No", r { hideSuggestion(label) })))))))));
    disposeWindowAfter_unlessMouseInIt(f, showSuggestion_hideTime);
  }
  ret label;
}