code: func (podPresetStrategy) PrepareForUpdate(ctx context.Context, obj, old runtime.Object) {
  	newPodPreset := obj.(*settings.PodPreset)
  	oldPodPreset := old.(*settings.PodPreset)
  
  	// Update is not allowed
  	newPodPreset.Spec = oldPodPreset.Spec
  }
docs: // PrepareForUpdate clears fields that are not allowed to be set by end users on update.