// disabled because JDK 17 forbids.
svoid swing_clearLightWeightPopupCache() {
  /*swing {
    L cache = cast call(classForName("javax.swing.PopupFactory$LightWeightPopup"), 'getLightWeightPopupCache);
    if (nempty(cache)) {
      //print("Clearing LightWeightPopupCache");
      clear(cache);
    }
  }*/
}