}
	}
	c := &Controller{
		instanceID:       instanceID,
		store:            store,
		cleanupLimit:     rate.NewLimiter(rate.Limit(20), 1),
		cleanupQueue:     queue.NewDelayed(),
		adsConnections:   newAdsConnections(),
		maxConnectionAge: maxConnAge,
	}
	c.queue = controllers.NewQueue("unregister_workloadentry",
		controllers.WithMaxAttempts(maxRetries),

	watcher, err := fsnotify.NewWatcher()
	if err != nil {
		return nil, err
	}

	ret := &SecretManagerClient{
		queue:         queue.NewDelayed(queue.DelayQueueBuffer(0)),
		caClient:      caClient,
		configOptions: options,
		existingCertificateFile: security.SdsCertificateConfig{
			CertificatePath:   options.CertChainFilePath,