return nil
	}
	var res []model.ServiceInfo
	for _, p := range c.GetRegistries() {
		res = append(res, p.ServicesForWaypoint(key)...)
	}
	return res
}

func (c *Controller) WorkloadsForWaypoint(key model.WaypointKey) []model.WorkloadInfo {
	if !features.EnableAmbientWaypoints {
		return nil
	}
	var res []model.WorkloadInfo
	for _, p := range c.GetRegistries() {
		res = append(res, p.WorkloadsForWaypoint(key)...)
	}

		ctrl.AddRegistry(r)
	}

	// Test Get
	result := ctrl.GetRegistries()
	if l := len(result); l != 3 {
		t.Fatalf("Expected length of the registries slice should be 3, got %d", l)
	}

	// Test Delete cluster2
	ctrl.DeleteRegistry(registries[1].ClusterID, registries[1].ProviderID)
	result = ctrl.GetRegistries()
	if l := len(result); l != 2 {