}
	)

	mockCtrl := gomock.NewController(t)
	defer mockCtrl.Finish()
	mockStatsProvider := statstest.NewMockProvider(mockCtrl)

	mockStatsProvider.EXPECT().ListPodStats(ctx).Return(podStats, nil).AnyTimes()
	mockStatsProvider.EXPECT().ListPodStatsAndUpdateCPUNanoCoreUsage(ctx).Return(podStats, nil).AnyTimes()

)

// Provider hosts methods required by stats handlers.
type Provider interface {
	// The following stats are provided by either CRI or cAdvisor.
	//
	// ListPodStats returns the stats of all the containers managed by pods.
	ListPodStats(ctx context.Context) ([]statsapi.PodStats, error)
	// ListPodStatsAndUpdateCPUNanoCoreUsage updates the cpu nano core usage for

	mockStatsProvider.EXPECT().GetNodeConfig().Return(nodeConfig).AnyTimes()
	mockStatsProvider.EXPECT().GetPodCgroupRoot().Return(cgroupRoot).AnyTimes()
	mockStatsProvider.EXPECT().ListPodStats(ctx).Return(podStats, nil).AnyTimes()
	mockStatsProvider.EXPECT().ListPodStatsAndUpdateCPUNanoCoreUsage(ctx).Return(podStats, nil).AnyTimes()

func (collector *volumeStatsCollector) CollectWithStability(ch chan<- metrics.Metric) {
	ctx := context.Background()
	podStats, err := collector.statsProvider.ListPodStats(ctx)
	if err != nil {
		return
	}
	addGauge := func(desc *metrics.Desc, pvcRef *stats.PVCReference, v float64, lv ...string) {
		lv = append([]string{pvcRef.Namespace, pvcRef.Name}, lv...)

	}
	var podStats []statsapi.PodStats
	if updateStats {
		podStats, err = sp.provider.ListPodStatsAndUpdateCPUNanoCoreUsage(ctx)
	} else {
		podStats, err = sp.provider.ListPodStats(ctx)
	}
	if err != nil {
		return nil, fmt.Errorf("failed to list pod stats: %v", err)
	}

	rlimit, err := sp.provider.RlimitStats()
	if err != nil {

	runtimeCache kubecontainer.RuntimeCache
	containerStatsProvider
}

// containerStatsProvider is an interface that provides the stats of the
// containers managed by pods.
type containerStatsProvider interface {
	ListPodStats(ctx context.Context) ([]statsapi.PodStats, error)
	ListPodStatsAndUpdateCPUNanoCoreUsage(ctx context.Context) ([]statsapi.PodStats, error)
	ListPodCPUAndMemoryStats(ctx context.Context) ([]statsapi.PodStats, error)