testPlane[i] = 127;
testPlane[i] = 126;
    private byte[] getTestPlane()    {        if (testPlane == null)        {            Integer planeSize = pixbuf.getPlaneSize();            testPlane = new byte[planeSize.intValue()];                        for (int i = 0; i < planeSize; i++)            {                if (i % 2 == 0)                    testPlane[i] = -128;                else                    testPlane[i] = 127;            }                        byte[] md = Helper.calculateMessageDigest(testPlane);            originalDigest = Helper.bytesToHex(md);        }                return testPlane;    }