@Override
    public void deserialize(Buffer buf) {
        requestId = buf.readUByte();
        if (requestId < 0 || requestId > 255)
            throw new RuntimeException("Forbidden value on requestId = " + requestId + ", it doesn't respect the following condition : requestId < 0 || requestId > 255");
        contactType = buf.readByte();
        if (contactType < 0)
            throw new RuntimeException("Forbidden value on contactType = " + contactType + ", it doesn't respect the following condition : contactType < 0");
    }