}
		return apimachineryvalidation.NameIsDNSSubdomain(strings.TrimPrefix(name, requiredPrefix), isPrefix)
	}
}

func extractSignerNameFromClusterTrustBundleName(name string) (string, bool) {
	if splitPoint := strings.LastIndex(name, ":"); splitPoint != -1 {
		// This looks like it refers to a signerName trustbundle.

					allErrs = append(allErrs, field.Required(projPath.Child("name"), "must be a valid object name"))
				}

				name := *source.ClusterTrustBundle.Name
				if signerName, ok := extractSignerNameFromClusterTrustBundleName(name); ok {
					validationFunc := ValidateClusterTrustBundleName(signerName)
					errMsgs := validationFunc(name, false)
					for _, msg := range errMsgs {