code: func (serviceStatusStrategy) PrepareForUpdate(ctx context.Context, obj, old runtime.Object) {
  	newService := obj.(*api.Service)
  	oldService := old.(*api.Service)
  	// status changes are not allowed to update spec
  	newService.Spec = oldService.Spec
  }
docs: // PrepareForUpdate clears fields that are not allowed to be set by end users on update of status