public void Test_ObserveSeqno_Parse_Packet()
        {
            var converter = new DefaultConverter();
            var packet = new byte []
            {
                0x81, //magic
                0x01, //opcode
                0x00, 0x00, //key length
                0x10, //extra length
                0x00, //data type
                0x00, 0x00, //status
                0x00, 0x00, 0x00, 0x10, //total body
                0x00, 0x00, 0x00, 0x01, //opaque
                0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,//cas
                0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x30, 0x39, //uuid
                0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x2D //seqno
            };
            var extras = new byte[converter.ToByte(packet, HeaderIndexFor.ExtrasLength)];
            var uuid = converter.ToUInt64(packet, 24);
            var seqno = converter.ToInt64(packet, 32);

            Assert.AreEqual(12345, uuid);
            Assert.AreEqual(45, seqno);
        }