AcManager.Tools.Objects.CarObject.CompareTo C# (CSharp) Метод

        public override int CompareTo(AcPlaceholderNew o) {
            var r = o as CarObject;
            if (r == null) return base.CompareTo(o);

            var tp = Parent;
            var rp = r.Parent;
            if (rp == this) return -1;
            if (tp == r) return 1;
            if (tp == rp) return Compare(this, r);
            return Compare(tp ?? this, rp ?? r);
        }