versionedObjOld := &appsv1.Deployment{ObjectMeta: metav1.ObjectMeta{ResourceVersion: "1", Name: "myname", Namespace: "myns"}}
	userInfo := &user.DefaultInfo{
		Name:   "myuser",
		Groups: []string{"mygroup"},
		UID:    "myuid",
		Extra:  map[string][]string{"extrakey": {"value1", "value2"}},
	}
	attrs := admission.NewAttributesRecord(
		internalObj.DeepCopyObject(),
		internalObjOld.DeepCopyObject(),

		if !ok {
			return input, nil, errors.New("Input object is not unstructured")
		}
		unstructured.SetNestedField(u.Object, "value", "field")
		return u, nil, nil
	}
	wrongID := types.UID("wrong-uid")
	myID := types.UID("my-uid")
	err = s.GuaranteedUpdate(context.Background(), "key", obj, false, &storage.Preconditions{UID: &wrongID}, updateFunc, true, nil)