code: func (resourcequotaStrategy) PrepareForUpdate(ctx context.Context, obj, old runtime.Object) {
  	newResourcequota := obj.(*api.ResourceQuota)
  	oldResourcequota := old.(*api.ResourceQuota)
  	newResourcequota.Status = oldResourcequota.Status
  	resourcequotautil.DropDisabledFields(&newResourcequota.Spec, &oldResourcequota.Spec)
  }
docs: // PrepareForUpdate clears fields that are not allowed to be set by end users on update.