registries := []serviceregistry.Simple{
		{
			ProviderID:          "registry1",
			ClusterID:           "cluster1",
			DiscoveryController: memory.NewServiceDiscovery(),
		},
		{
			ProviderID:          "registry2",
			ClusterID:           "cluster2",
			DiscoveryController: memory.NewServiceDiscovery(),
		},
		{
			ProviderID:          provider.Kubernetes,
			ClusterID:           "cluster3",

	}
}

func (c *Controller) addRegistry(registry serviceregistry.Instance, stop <-chan struct{}) {
	added := false
	if registry.Provider() == provider.Kubernetes {
		for i, r := range c.registries {
			if r.Provider() != provider.Kubernetes {
				// insert the registry in the position of the first non kubernetes registry

	for k, v := range kl.nodeLabels {
		if cv, found := node.ObjectMeta.Labels[k]; found {
			klog.InfoS("the node label will overwrite default setting", "labelKey", k, "labelValue", v, "default", cv)
		}
		node.ObjectMeta.Labels[k] = v
	}

	if kl.providerID != "" {
		node.Spec.ProviderID = kl.providerID
	}

	if kl.cloud != nil {

		"NodeStatusUpdateFrequency.Duration",
		"NodeStatusReportFrequency.Duration",
		"OOMScoreAdj",
		"PodCIDR",
		"PodPidsLimit",
		"PodsPerCore",
		"Port",
		"ProtectKernelDefaults",
		"ProviderID",
		"ReadOnlyPort",
		"RegisterNode",
		"RegistryBurst",
		"RegistryPullQPS",
		"ReservedMemory",
		"ReservedSystemCPUs",
		"RegisterWithTaints",
		"RuntimeRequestTimeout.Duration",
		"RunOnce",

	for _, instance := range opts.Instances {
		msd.AddInstance(instance)
	}
	msd.AddGateways(opts.Gateways...)
	msd.ClusterID = cluster2.ID(provider.Mock)
	memserviceRegistry := serviceregistry.Simple{
		ClusterID:           cluster2.ID(provider.Mock),
		ProviderID:          provider.Mock,
		DiscoveryController: msd,
	}
	serviceDiscovery.AddRegistry(memserviceRegistry)
	for _, reg := range opts.ServiceRegistries {

	fs.StringVar(&f.CloudProvider, "cloud-provider", f.CloudProvider, "The provider for cloud services. Set to empty string for running with no cloud provider. Set to 'external' for running with an external cloud provider. If set, the cloud provider determines the name of the node (consult cloud provider documentation to determine if and how the hostname is used).")

        given:
        def provider1 = registerService("one", ServiceImpl)
        def provider2 = registerService("two", StoppableServiceImpl)
        def provider3 = registerService("three", StoppableServiceImpl)

        when:
        def notStoppable = provider1.get()
        def stoppable1 = provider2.get()
        def stoppable2 = provider3.get()

        then:

     *
     * @param provider The provider whose value should be used when this provider has no value.
     * @since 5.6
     */
    Provider<T> orElse(Provider<? extends T> provider);

    /**
     * Deprecated. There is no need to use this method.
     *
     * @since 6.5
     * @deprecated Since version 7.4 this method does nothing. All providers can be used at configuration time without explicit opt-in.

====

Providers:

* Properties with these types are read-only.
* The method link:{javadocPath}/org/gradle/api/provider/Provider.html#get--[Provider.get()] returns the current value of the property.
* A `Provider` can be created from another `Provider` using link:{javadocPath}/org/gradle/api/provider/Provider.html#map-org.gradle.api.Transformer-[Provider.map(Transformer)].

** If it's a new property, expose it as a link:{javadocPath}/org/gradle/api/provider/Property.html[Property] or link:{javadocPath}/org/gradle/api/provider/Provider.html[Provider] using a single getter.
** If it's incubating, change it to use a link:{javadocPath}/org/gradle/api/provider/Property.html[Property] or link:{javadocPath}/org/gradle/api/provider/Provider.html[Provider] using a single getter.