func newCertificateSigningRequestInformer(client release_1_5.Interface, resyncPeriod time.Duration) cache.SharedIndexInformer {
	sharedIndexInformer := cache.NewSharedIndexInformer(
		&cache.ListWatch{
			ListFunc: func(options v1.ListOptions) (runtime.Object, error) {
				return client.CertificatesV1alpha1().CertificateSigningRequests().List(options)
			},
			WatchFunc: func(options v1.ListOptions) (watch.Interface, error) {
				return client.CertificatesV1alpha1().CertificateSigningRequests().Watch(options)
			},
		},
		&certificates_v1alpha1.CertificateSigningRequest{},
		resyncPeriod,
		cache.Indexers{cache.NamespaceIndex: cache.MetaNamespaceIndexFunc},
	)

	return sharedIndexInformer
}