public static byte buildHigh2Low6Bytes(byte high2, byte low6) {
        return (byte) ((high2 << 6) + low6);
    }
@Test
    public void buildHigh2Low6Bytes() {
        byte bs = CodecUtils.buildHigh2Low6Bytes((byte) 1, (byte) 53);
        Assert.assertEquals(bs, (byte) 117);
    }