public void modifyTexture(
                final JmeBatchRenderBackend backend,
                final Texture2D textureAtlas,
                final int x,
                final int y) {
            backend.modifyTexture(textureAtlas, image, x, y);
        }
Simple BatchRenderBackend.Image implementation that will transport the
dimensions of an image as well as the actual bytes from the loadImage()
to the addImageToTexture() method.

@author void
jme3-niftygui/src/main/java/com/jme3/niftygui/JmeBatchRenderBackend.java