var formattedList []string
	for _, ep := range endpoints {
		formattedList = append(formattedList, ep.String())
	}
	return formattedList
}

// endpointSliceCacheKeys returns cache keys used for a given EndpointSlice.
func endpointSliceCacheKeys(endpointSlice *discovery.EndpointSlice) (types.NamespacedName, string, error) {
	var err error
	serviceName, ok := endpointSlice.Labels[discovery.LabelServiceName]

			if tc.initialSlice != nil {
				tc.cache.updatePending(tc.initialSlice, false)
				tc.cache.checkoutChanges()
			}

			serviceKey, sliceKey, err := endpointSliceCacheKeys(tc.updatedSlice)
			if err != nil {
				t.Fatalf("Expected no error calling endpointSliceCacheKeys(): %v", err)
			}

			esData := &endpointSliceData{tc.updatedSlice, false}
			changed := tc.cache.esDataChanged(serviceKey, sliceKey, esData)

		return false
	}

	// This should never happen
	if endpointSlice == nil {
		klog.ErrorS(nil, "Nil endpointSlice passed to EndpointSliceUpdate")
		return false
	}

	namespacedName, _, err := endpointSliceCacheKeys(endpointSlice)
	if err != nil {
		klog.InfoS("Error getting endpoint slice cache keys", "err", err)
		return false
	}

	metrics.EndpointChangesTotal.Inc()

	ect.lock.Lock()
	defer ect.lock.Unlock()