func Add(mgr manager.Manager, runtimeConfig config.RuntimeConfig) error {
	// ......
	modelRouter := &ModelRouter{
		Client:        mgr.GetClient(),
		RuntimeConfig: runtimeConfig,
	}

	_, err = deploymentInformer.AddEventHandler(cache.ResourceEventHandlerFuncs{
		AddFunc:    modelRouter.addRouteFromDeployment,
		DeleteFunc: modelRouter.deleteRouteFromDeployment,
	})
	if err != nil {
		return err
	}

	_, err = modelInformer.AddEventHandler(cache.ResourceEventHandlerFuncs{
		AddFunc:    modelRouter.addRouteFromModelAdapter,
		DeleteFunc: modelRouter.deleteRouteFromModelAdapter,
	})
	if err != nil {
		return err
	}

	_, err = fleetInformer.AddEventHandler(cache.ResourceEventHandlerFuncs{
		AddFunc:    modelRouter.addRouteFromRayClusterFleet,
		DeleteFunc: modelRouter.deleteRouteFromRayClusterFleet,
	})

	return err
}