private String partToString(byte part) {
        if (part == -1) {
            return "x";
        } else {
            return String.valueOf(part);
        }
    }
Unity engine version string container.

@author Nico Bergemann <barracuda415 at yahoo.de>
disunity-core/src/main/java/info/ata4/junity/UnityVersion.java