code: @Override
      public void render() {
          GdxUtilities.clearScreen();
          if (currentView != null) {
              currentView.render(Gdx.graphics.getDeltaTime());
          }
      }
docs: Clears the screen using {@link GdxUtilities#clearScreen()}. Calls {@link AbstractLmlView#render(float)} on
  current view (if it isn't empty) with current delta time.