discoverResourcesFn := namespaceKubeClient.Discovery().ServerPreferredNamespacedResources--> // fetch all api resources
	all, err := ServerPreferredResources(d)-->
		serverGroupList, err := d.ServerGroups()
		groupVersionResources, failedGroups := fetchGroupVersionResources(d, serverGroupList)
		apiResourceList, ok := groupVersionResources[groupVersion]

NewNamespaceController()-->
	namespaceController := &NamespaceController{
		queue:                      workqueue.NewNamedRateLimitingQueue(nsControllerRateLimiter(), "namespace"),
		namespacedResourcesDeleter: deletion.NewNamespacedResourcesDeleter(kubeClient.CoreV1().Namespaces(), metadataClient, kubeClient.CoreV1(), discoverResourcesFn, finalizerToken),
	}
	namespaceInformer.Informer().AddEventHandlerWithResyncPeriod()-->
		AddFunc: func(obj interface{}) {
				namespace := obj.(*v1.Namespace)
				namespaceController.enqueueNamespace(namespace)
			}
Run(workers int, stopCh <-chan struct{})-->
	for i := 0; i < workers; i++ {
		go wait.Until(nm.worker, time.Second, stopCh)-->
			key, quit := nm.queue.Get()
			err := nm.syncNamespaceFromKey(key.(string))
			namespace, err := nm.lister.Get(key)
			nm.namespacedResourcesDeleter.Delete(namespace.Name)-->
			//func (d *namespacedResourcesDeleter) Delete(nsName string) error
				namespace, err := d.nsClient.Get(context.TODO(), nsName, metav1.GetOptions{})
				if namespace.DeletionTimestamp == nil {
					return nil
				}
			d.deleteAllContent(namespace)-->
				resources, err := d.discoverResourcesFn()
				gvrDeletionMetadata, err := d.deleteAllContentForGroupVersionResource(gvr, namespace, namespaceDeletedAt)
				deletableResources := discovery.FilteredBy(discovery.SupportsAllVerbs{Verbs: []string{"delete"}}, resources)
	}