func addKnownTypes(scheme *runtime.Scheme) error {
	scheme.AddKnownTypes(SchemeGroupVersion,
		&VolumeAttachment{},
		&VolumeAttachmentList{},
		&CSIStorageCapacity{},
		&CSIStorageCapacityList{},
		&VolumeAttributesClass{},
		&VolumeAttributesClassList{},
	)

	metav1.AddToGroupVersion(scheme, SchemeGroupVersion)
	return nil

carlory <******@****.***> 1698718384 +0800

		&StorageClassList{},
		&VolumeAttachment{},
		&VolumeAttachmentList{},
		&CSINode{},
		&CSINodeList{},
		&CSIDriver{},
		&CSIDriverList{},
		&CSIStorageCapacity{},
		&CSIStorageCapacityList{},
		&VolumeAttributesClass{},
		&VolumeAttributesClassList{},
	)
	return nil

SataQiu <******@****.***> 1713430345 +0800

SataQiu <******@****.***> 1702613527 +0800

// AlphaIsDefaultVolumeAttributesClassAnnotation is the alpha version of IsDefaultVolumeAttributesClassAnnotation.
const AlphaIsDefaultVolumeAttributesClassAnnotation = "volumeattributesclass.alpha.kubernetes.io/is-default-class"

// IsDefaultAnnotation returns a boolean if
// the annotation is set
// TODO: remove Beta when no longer needed
func IsDefaultAnnotation(obj metav1.ObjectMeta) bool {

	cases := map[string]struct {
		oldClass      *storage.VolumeAttributesClass
		newClass      *storage.VolumeAttributesClass
		shouldSucceed bool
	}{
		"invalid driverName update": {
			oldClass: &storage.VolumeAttributesClass{
				DriverName: "kubernetes.io/foo",
			},
			newClass: &storage.VolumeAttributesClass{
				DriverName: "kubernetes.io/bar",
			},
			shouldSucceed: false,

}

// +k8s:deepcopy-gen:interfaces=k8s.io/apimachinery/pkg/runtime.Object

// VolumeAttributesClass represents a specification of mutable volume attributes
// defined by the CSI driver. The class can be specified during dynamic provisioning
// of PersistentVolumeClaims, and changed in the PersistentVolumeClaim spec after provisioning.
type VolumeAttributesClass struct {
	metav1.TypeMeta

	// Standard object's metadata.

func DropDisabledSpecFields(pvSpec *api.PersistentVolumeSpec, oldPVSpec *api.PersistentVolumeSpec) {
	if !utilfeature.DefaultFeatureGate.Enabled(features.VolumeAttributesClass) {
		if oldPVSpec == nil || oldPVSpec.VolumeAttributesClassName == nil {
			pvSpec.VolumeAttributesClassName = nil
		}
	}
}

// DropDisabledStatusFields removes disabled fields from the pv status.

			expectOldSpec: specWithVACName(nil),
		},
	}

	for name, tc := range tests {
		t.Run(name, func(t *testing.T) {
			featuregatetesting.SetFeatureGateDuringTest(t, utilfeature.DefaultFeatureGate, features.VolumeAttributesClass, tc.vacEnabled)

			DropDisabledSpecFields(tc.newSpec, tc.oldSpec)
			if !reflect.DeepEqual(tc.newSpec, tc.expectNewSpec) {
				t.Error(cmp.Diff(tc.newSpec, tc.expectNewSpec))
			}