code: func NameIsDNS952Label(name string, prefix bool) (bool, string) {
  	if prefix {
  		name = maskTrailingDash(name)
  	}
  	if validation.IsDNS952Label(name) {
  		return true, ""
  	}
  	return false, DNS952LabelErrorMsg
  }
docs: // NameIsDNS952Label is a ValidateNameFunc for names that must be a DNS 952 label.