func IsWildcardDNS1123Label(value string) bool {
	return len(value) <= DNS1123LabelMaxLength && wildcardPrefixRegexp.MatchString(value)
}

// validateTagKey checks that a string is valid as a Kubernetes label name.
func validateTagKey(k string) error {
	match := tagRegexp.FindStringSubmatch(k)
	if match == nil {
		return fmt.Errorf("invalid tag key: %q", k)
	}

	if len(match[1]) > 0 {