* Send a close frame with optional code and reason.
   *
   * @param code Status code as defined by
   *     [Section 7.4 of RFC 6455](http://tools.ietf.org/html/rfc6455#section-7.4) or `0`.
   * @param reason Reason for shutting down or `null`.
   */
  @Throws(IOException::class)
  fun writeClose(
    code: Int,
    reason: ByteString?,
  ) {
    var payload = ByteString.EMPTY
    if (code != 0 || reason != null) {

//  2. used anywhere inside the controller itself:
//     2.1. [TODO] logging should use a canonical controller name when referencing a controller (Eg. Starting X, Shutting down X)
//     2.2. [TODO] emitted events should have an EventSource.Component set to the controller name (usually when initializing an EventRecorder)

	needReset, resetDuration := func() (bool, time.Duration) {
		q.mutex.Lock()
		defer q.mutex.Unlock()

		if q.stopping {
			// Ignore the event, since we're already shutting down.
			return false, 0
		}

		e := q.heap.peek()
		if e == nil || e.deadline.Equal(q.currentDeadline) {
			// nothing to do.
			return false, 0
		}

		q.currentDeadline = e.deadline

		leaseNamespace: leaseNamespace,
		gcCheckPeriod:  gcCheckPeriod,
	}
}

// Run starts one worker.
func (c *Controller) Run(stopCh <-chan struct{}) {
	defer utilruntime.HandleCrash()
	defer klog.Infof("Shutting down apiserver lease garbage collector")

	klog.Infof("Starting apiserver lease garbage collector")

	// we have a personal informer that is narrowly scoped, start it.
	go c.leaseInformer.Run(stopCh)

// called in case of panic.  HandleCrash actually crashes, after calling the
// handlers and logging the panic message.
//
// E.g., you can provide one or more additional handlers for something like shutting down go routines gracefully.
//
// TODO(pohly): logcheck:context // HandleCrashWithContext should be used instead of HandleCrash in code which supports contextual logging.
func HandleCrash(additionalHandlers ...func(interface{})) {

	klog.InfoS("Starting Kubelet Plugin Manager")
	go pm.reconciler.Run(stopCh)

	metrics.Register(pm.actualStateOfWorld, pm.desiredStateOfWorld)
	<-stopCh
	klog.InfoS("Shutting down Kubelet Plugin Manager")
}

func (pm *pluginManager) AddHandler(pluginType string, handler cache.PluginHandler) {
	pm.reconciler.AddHandler(pluginType, handler)

		store:     store,
		reflector: reflector,
		hasSynced: func() (bool, error) { return store.hasSynced(), nil },
		stopCh:    make(chan struct{}),
	}

	// Don't start reflector if Kubelet is already shutting down.
	if !c.stopped {
		go item.startReflector()
	}
	return item
}

func (c *objectCache) AddReference(namespace, name string, referencedFrom types.UID) {

	defer nc.eventBroadcaster.Shutdown()
	klog.FromContext(ctx).Info("Starting ipam controller")
	defer klog.FromContext(ctx).Info("Shutting down ipam controller")

	if !cache.WaitForNamedCacheSync("node", ctx.Done(), nc.nodeInformerSynced) {
		return
	}

func (c *Controller) Run(stopCh <-chan struct{}) {
	defer utilruntime.HandleCrash()
	defer c.queue.ShutDown()

	klog.Info("Starting legacy_token_tracking_controller")
	defer klog.Infof("Shutting down legacy_token_tracking_controller")

	go c.configMapInformer.Run(stopCh)
	if !cache.WaitForNamedCacheSync("configmaps", stopCh, c.configMapSynced) {
		return
	}

	defer utilruntime.HandleCrash()
	defer cc.queue.ShutDown()

	logger := klog.FromContext(ctx)
	logger.Info("Starting certificate controller", "name", cc.name)
	defer logger.Info("Shutting down certificate controller", "name", cc.name)

	if !cache.WaitForNamedCacheSync(fmt.Sprintf("certificate-%s", cc.name), ctx.Done(), cc.csrsSynced) {
		return
	}

	for i := 0; i < workers; i++ {