docs: public void show(int x, int y) {
          disabledHLayout.setSize("100%", "100%");
          disabledHLayout.setStyleName("disabledBackgroundStyle");
          disabledHLayout.show();
  
          loadingImg.setSize("100px", "100px");
          loadingImg.setTop(y); //loading image height is 50px
          loadingImg.setLeft(x); //loading image width is 50px
          loadingImg.show();
          loadingImg.bringToFront();
      }