cache.FilteringResourceEventHandler{
			FilterFunc: func(obj interface{}) bool {
				switch t := obj.(type) {
				case *v1.Secret:
					return t.Type == bootstrapapi.SecretTypeBootstrapToken && t.Namespace == e.tokenSecretNamespace
				default:
					utilruntime.HandleError(fmt.Errorf("object passed to %T that is not expected: %T", e, obj))
					return false
				}
			},

		cache.FilteringResourceEventHandler{
			FilterFunc: func(obj interface{}) bool {
				switch t := obj.(type) {
				case *v1.Secret:
					return t.Type == bootstrapapi.SecretTypeBootstrapToken && t.Namespace == e.secretNamespace
				default:
					utilruntime.HandleError(fmt.Errorf("object passed to %T that is not expected: %T", e, obj))
					return false
				}
			},

	// First, build our selector for bootstrap tokens only
	klog.V(1).Infoln("[token] preparing selector for bootstrap token")
	tokenSelector := fields.SelectorFromSet(
		map[string]string{
			"type": string(bootstrapapi.SecretTypeBootstrapToken),
		},
	)
	listOptions := metav1.ListOptions{
		FieldSelector: tokenSelector.String(),
	}

	klog.V(1).Info("[token] retrieving list of bootstrap tokens")

	// TLSPrivateKeyKey is the key for the private key field in a TLS secret.
	TLSPrivateKeyKey = "tls.key"
	// SecretTypeBootstrapToken is used during the automated bootstrap process (first
	// implemented by kubeadm). It stores tokens that are used to sign well known
	// ConfigMaps. They are used for authn.
	SecretTypeBootstrapToken SecretType = "bootstrap.kubernetes.io/token"
)

	// TLSPrivateKeyKey is the key for the private key field in a TLS secret.
	TLSPrivateKeyKey = "tls.key"
	// SecretTypeBootstrapToken is used during the automated bootstrap process (first
	// implemented by kubeadm). It stores tokens that are used to sign well known
	// ConfigMaps. They are used for authn.
	SecretTypeBootstrapToken SecretType = "bootstrap.kubernetes.io/token"
)