}
	if len(apiGroup) > 0 && !allowInvalidAPIGroupInDataSourceOrRef {
		for _, errString := range validation.IsDNS1123Subdomain(apiGroup) {
			allErrs = append(allErrs, field.Invalid(fldPath.Child("apiGroup"), apiGroup, errString))
		}
	}

	return allErrs
}

// validateDataSourceRef validates a DataSourceRef in a PersistentVolumeClaimSpec

- Kubeadm: relax the validation of kubeconfig server URLs. Allow the user to define custom kubeconfig server URLs without erroring out during validation of existing kubeconfig files (e.g. when using external CA mode). ([#94816](https://github.com/kubernetes/kubernetes/pull/94816), [@neolit123](https://github.com/neolit123)) [SIG Cluster Lifecycle]

###  Introduced KMS v2