PixelsService service = PixelsService.getInstance();
PixelsService service = new PixelsService(PixelsService.ROOT_DEFAULT);
    public void testInitialPlane()        throws IOException, DimensionsOutOfBoundsException    {        PixelsService service = PixelsService.getInstance();        PixelBuffer pixbuf = service.getPixelBuffer(pixels);        MappedByteBuffer plane = pixbuf.getPlane(0, 0, 0);        byte[] messageDigest = Helper.calculateMessageDigest(plane);                assertEquals(Helper.bytesToHex(originalDigests[0]),                     Helper.bytesToHex(messageDigest));    }