protected DTLZ2(DTLZ2 original, Cloner cloner) : base(original, cloner) { }
protected DTLZ2(DTLZ2 original, Cloner cloner) : base(original, cloner) { }
protected DTLZ2(DTLZ2 original, Cloner cloner) : base(original, cloner) { }
protected DTLZ2(DTLZ2 original, Cloner cloner) : base(original, cloner) { }