code: func (namespaceStrategy) PrepareForUpdate(ctx context.Context, obj, old runtime.Object) {
  	newNamespace := obj.(*api.Namespace)
  	oldNamespace := old.(*api.Namespace)
  	newNamespace.Spec.Finalizers = oldNamespace.Spec.Finalizers
  	newNamespace.Status = oldNamespace.Status
  }
docs: // PrepareForUpdate clears fields that are not allowed to be set by end users on update.