@Override
    public void writeByteRange(boolean utf8String, int fieldNumber, byte[] value, int offset, int length,
            boolean repeated) throws IOException
    {
        writeBytes(fieldNumber, value, offset, length, repeated, utf8String);
    }
Returns true if the last written field was a repeated field.
protostuff-msgpack/src/main/java/io/protostuff/MsgpackXOutput.java