// TransformationSingle represents a one-to-one relationship between I and O.
	TransformationSingle[I, O any] func(ctx HandlerContext, i I) *O
	// TransformationMulti represents a one-to-many relationship between I and O.
	TransformationMulti[I, O any] func(ctx HandlerContext, i I) []O
)

// Key is a string, but with a type associated to avoid mixing up keys
type Key[O any] string

func NewManyCollection[I, O any](c Collection[I], hf TransformationMulti[I, O], opts ...CollectionOption) Collection[O] {
	o := buildCollectionOptions(opts...)
	if o.name == "" {
		o.name = fmt.Sprintf("ManyCollection[%v,%v]", ptr.TypeName[I](), ptr.TypeName[O]())
	}
	return newManyCollection[I, O](c, hf, o)
}

func newManyCollection[I, O any](cc Collection[I], hf TransformationMulti[I, O], opts collectionOptions) Collection[O] {

	return WorkloadServices
}

func (a *index) serviceEntryServiceBuilder(
	Waypoints krt.Collection[Waypoint],
	Namespaces krt.Collection[*v1.Namespace],
) krt.TransformationMulti[*networkingclient.ServiceEntry, model.ServiceInfo] {
	return func(ctx krt.HandlerContext, s *networkingclient.ServiceEntry) []model.ServiceInfo {
		waypoint := fetchWaypointForService(ctx, Waypoints, Namespaces, s.ObjectMeta)

	AuthorizationPolicies krt.Collection[model.WorkloadAuthorization],
	PeerAuths krt.Collection[*securityclient.PeerAuthentication],
	Waypoints krt.Collection[Waypoint],
	Namespaces krt.Collection[*v1.Namespace],
) krt.TransformationMulti[*networkingclient.ServiceEntry, model.WorkloadInfo] {
	return func(ctx krt.HandlerContext, se *networkingclient.ServiceEntry) []model.WorkloadInfo {
		eps := se.Spec.Endpoints