code: func ValidatePodPresetUpdate(pip, oldPip *settings.PodPreset) field.ErrorList {
  	allErrs := apivalidation.ValidateObjectMetaUpdate(&pip.ObjectMeta, &oldPip.ObjectMeta, field.NewPath("metadata"))
  	allErrs = append(allErrs, ValidatePodPresetSpec(&pip.Spec, field.NewPath("spec"))...)
  
  	return allErrs
  }
docs: // ValidatePodPresetUpdate tests if required fields in the PodPreset are set.