Reference loops

Reference loops in objects serialized by value are ignored. Something like this:

public class ReferenceLoop_MB : MonoBehaviour, ISaveable
{
    [SaveThis] A myA;
    [SaveThis] B myB;
    void Start()
    {
        myA= new A();
        myB = new B();
        myA.b = myB;
        myB.a = myA;
    }

}

    public class A : ISaveable{
        [SaveThis] public B b;
    }

    public class B : ISaveable{
        [SaveThis] public A a;
    }

will be serialized like this: