}

var supportedFSGroupPolicy = sets.NewString(string(storage.ReadWriteOnceWithFSTypeFSGroupPolicy), string(storage.FileFSGroupPolicy), string(storage.NoneFSGroupPolicy))

// validateFSGroupPolicy tests if FSGroupPolicy contains an appropriate value.
func validateFSGroupPolicy(fsGroupPolicy *storage.FSGroupPolicy, fldPath *field.Path) field.ErrorList {
	allErrs := field.ErrorList{}
	if fsGroupPolicy == nil {