API Get unmarshaller doesn't respect the APIVersion when the Kind is the same

[fanminshi]

For example, Get can retrieve a object at APIVersion apps/v1beta1 and still unmarshall the data into the object d with a different type apps/v1 as shown in d := &appsv1.Deployment{}.

       name := "memcached-operator"
	namespace := "default"
	d := &appsv1.Deployment{
		TypeMeta: metav1.TypeMeta{
			Kind:       "Deployment",
			APIVersion: "apps/v1beta1",
		},
		ObjectMeta: metav1.ObjectMeta{
			Name:      name,
			Namespace: namespace,
		},
	}
	err := query.Get(d)
	if err != nil {
		logrus.Infof("Failed to get Deployment via sdk %v : %v", name, err)
	}

Output:
None

[hasbro17]

To expand on the underlying issue, when decoding from JSON data for apps/v1beta1 Deployment into the Go type for apps/v1 Deployment the decoder does not give an error because the json scheme for both apiversions objects is the same.
https://github.com/coreos/operator-sdk/blob/master/pkg/util/k8sutil/k8sutil.go#L96
https://github.com/kubernetes/apimachinery/blob/master/pkg/runtime/interfaces.go#L51-L58