anchor.diff:  Learn more from the NiftyGUI page:
   
   *  link:https://github.com/nifty-gui/nifty-gui/raw/1.4/nifty-core/manual/nifty-gui-the-manual-1.3.2.pdf[Nifty GUI - the Manual: Effects]
  -*  link:https://github.com/nifty-gui/nifty-gui/wiki/Effects[Effects] 
  +*  link:https://github.com/nifty-gui/nifty-gui/wiki/Effects[Effects]
   
   
   == Add Sound Effects
  
positive.code:     private Node localRootNode = new Node("Start Screen RootNode");
      private Node localGuiNode = new Node("Start Screen GuiNode");
      private final ColorRGBA backgroundColor = ColorRGBA.Gray;
  
      public StartScreenState() {
      }
  
      @Override
      protected void initialize(Application app) {
  
negative.code: 
  public class TestNiftyGui extends SimpleApplication {
    public void simpleInitApp() {
       StartScreenState startScreenState = new StartScreenState();
       stateManager.attach(startScreenState);
       // [...] boilerplate init nifty omitted
       nifty.fromXml("Interface/myGui.xml", "start", startScreenState); //one of the XML screen elements needs to reference StartScreenState controller class
  