code: protected static void preloadAndLaunch(final Class<? extends Preloader> preloaderClass, final String... args) {
          preloadAndLaunch(ClassUtility.getClassFromStaticMethod(3), preloaderClass, args);
      }
docs: Launch the Current JavaFX Application with given preloader.
  
  @param preloaderClass the preloader class used as splash screen with progress
  @param args arguments passed to java command line