code: func (podPresetStrategy) ValidateUpdate(ctx context.Context, obj, old runtime.Object) field.ErrorList {
  	validationErrorList := validation.ValidatePodPreset(obj.(*settings.PodPreset))
  	updateErrorList := validation.ValidatePodPresetUpdate(obj.(*settings.PodPreset), old.(*settings.PodPreset))
  	return append(validationErrorList, updateErrorList...)
  }
docs: // ValidateUpdate is the default update validation for an end user.