testCases := []struct {
		arg     string
		es      endpointSet
		success bool
	}{
		// Tests invalid inputs.
		{
			"...",
			endpointSet{},
			false,
		},
		// No range specified.
		{
			"{...}",
			endpointSet{},
			false,
		},
		// Invalid range.
		{
			"http://minio{2...3}/export/set{1...0}",
			endpointSet{},
			false,
		},

func (cache *EndpointSliceCache) addEndpoints(svcPortName *ServicePortName, portNum int, endpointSet map[string]Endpoint, endpoints []discovery.Endpoint) map[string]Endpoint {
	if endpointSet == nil {
		endpointSet = map[string]Endpoint{}
	}

	// iterate through endpoints to add them to endpointSet.
	for _, endpoint := range endpoints {
		if len(endpoint.Addresses) == 0 {

	}
	return totalSizes
}

// Parses all arguments and returns an endpointSet which is a collection
// of endpoints following the ellipses pattern, this is what is used
// by the object layer for initializing itself.
func parseEndpointSet(setDriveCount uint64, args ...string) (ep endpointSet, err error) {
	argPatterns := make([]ellipses.ArgPattern, len(args))
	for i, arg := range args {

				}
				if (ss.RouteAcked != "") != wantAcked {
					errorHandler("wanted RouteAcked set %v got %v for %v", wantAcked, ss.RouteAcked, nodeID)
				}
				if (ss.EndpointSent != "") != wantSent {
					errorHandler("wanted EndpointSent set %v got %v for %v", wantSent, ss.EndpointSent, nodeID)
				}
				if (ss.EndpointAcked != "") != wantAcked {
					errorHandler("wanted EndpointAcked set %v got %v for %v", wantAcked, ss.EndpointAcked, nodeID)

	return types.NamespacedName{
		Namespace: slice.GetNamespace(),
		Name:      serviceNameForEndpointSlice(slice.GetLabels()),
	}
}

// endpointKey unique identifies an endpoint by IP and port name
// This is used for deduping endpoints across slices.
type endpointKey struct {
	ip   string
	port string
}

type endpointSliceCache struct {
	mu                         sync.RWMutex

	ListenerAcked        string         `json:"listener_acked,omitempty"`
	RouteSent            string         `json:"route_sent,omitempty"`
	RouteAcked           string         `json:"route_acked,omitempty"`
	EndpointSent         string         `json:"endpoint_sent,omitempty"`
	EndpointAcked        string         `json:"endpoint_acked,omitempty"`
	ExtensionConfigSent  string         `json:"extensionconfig_sent,omitempty"`