}
	if spec.DataSourceRef != nil {
		allErrs = append(allErrs, validateDataSourceRef(spec.DataSourceRef, fldPath.Child("dataSourceRef"), opts.AllowInvalidAPIGroupInDataSourceOrRef)...)
	}
	if spec.DataSourceRef != nil && spec.DataSourceRef.Namespace != nil && len(*spec.DataSourceRef.Namespace) > 0 {
		if spec.DataSource != nil {

  // and dataSourceRef contents will be copied to dataSource when dataSourceRef.namespace is not specified.
  // If the namespace is specified, then dataSourceRef will not be copied to dataSource.
  // +optional
  optional TypedLocalObjectReference dataSource = 7;

  // dataSourceRef specifies the object from which to populate the volume with data, if a non-empty

	"dataSourceRef":             "dataSourceRef specifies the object from which to populate the volume with data, if a non-empty volume is desired. This may be any object...

	// When the AnyVolumeDataSource feature gate is enabled, dataSource contents will be copied to dataSourceRef,
	// and dataSourceRef contents will be copied to dataSource when dataSourceRef.namespace is not specified.
	// If the namespace is specified, then dataSourceRef will not be copied to dataSource.
	// +optional
	DataSource *TypedLocalObjectReference

  // and dataSourceRef contents will be copied to dataSource when dataSourceRef.namespace is not specified.
  // If the namespace is specified, then dataSourceRef will not be copied to dataSource.
  // +optional
  optional TypedLocalObjectReference dataSource = 7;

  // dataSourceRef specifies the object from which to populate the volume with data, if a non-empty

	// and dataSourceRef contents will be copied to dataSource when dataSourceRef.namespace is not specified.
	// If the namespace is specified, then dataSourceRef will not be copied to dataSource.
	// +optional
	DataSource *TypedLocalObjectReference `json:"dataSource,omitempty" protobuf:"bytes,7,opt,name=dataSource"`

          },
          "dataSourceRef": {
            "allOf": [
              {

	out.VolumeMode = (*core.PersistentVolumeMode)(unsafe.Pointer(in.VolumeMode))
	out.DataSource = (*core.TypedLocalObjectReference)(unsafe.Pointer(in.DataSource))
	out.DataSourceRef = (*core.TypedObjectReference)(unsafe.Pointer(in.DataSourceRef))
	out.VolumeAttributesClassName = (*string)(unsafe.Pointer(in.VolumeAttributesClassName))
	return nil
}

- Added a new namespace alpha field to `DataSourceRef` field in `PersistentVolumeClaim` API. ([#113186](https://github.com/kubernetes/kubernetes/pull/113186), [@ttakahashi21](https://github.com/ttakahashi21))