private LinkedBuffer writeByteAndByte(byte b, byte v, WriteSession session, LinkedBuffer lb)
            throws IOException
    {
        return sink.writeByte(v, session,
                sink.writeByte(b, session, lb));
    }
Simple wrapper around WriteSink with methods specific for MessagePacker

@author Alex Shvid
protostuff-msgpack/src/main/java/io/protostuff/MsgpackWriteSink.java