code: @Override
      public final Scene removeAll()
      {
          if (LienzoCore.IS_CANVAS_SUPPORTED)
          {
              while (getElement().getChildCount() > 0)
              {
                  getElement().removeChild(getElement().getChild(0));
              }
          }
          super.removeAll();
  
          return this;
      }
docs: Removes all {@link Layer}