// namespace.
	GetPodByName(namespace, name string) (*v1.Pod, bool)
	// GetNode returns the spec of the local node.
	GetNode() (*v1.Node, error)
	// GetNodeConfig returns the configuration of the local node.
	GetNodeConfig() cm.NodeConfig
	// ListVolumesForPod returns the stats of the volume used by the pod with
	// the podUID.
	ListVolumesForPod(podUID types.UID) (map[string]volume.Volume, bool)

	// the following errors occur.
	node, err := sp.provider.GetNode()
	if err != nil {
		return nil, fmt.Errorf("failed to get node info: %v", err)
	}
	nodeConfig := sp.provider.GetNodeConfig()
	rootStats, networkStats, err := sp.provider.GetCgroupStats("/", updateStats)
	if err != nil {
		return nil, fmt.Errorf("failed to get root cgroup stats: %v", err)
	}
	rootFsStats, err := sp.provider.RootFsStats()

	defer cm.Unlock()
	cm.CalledFunctions = append(cm.CalledFunctions, "SystemCgroupsLimit")
	return v1.ResourceList{}
}

func (cm *FakeContainerManager) GetNodeConfig() NodeConfig {
	cm.Lock()
	defer cm.Unlock()
	cm.CalledFunctions = append(cm.CalledFunctions, "GetNodeConfig")
	return NodeConfig{}
}

func (cm *FakeContainerManager) GetMountedSubsystems() *CgroupSubsystems {
	cm.Lock()
	defer cm.Unlock()

	// These cgroups include the system and Kubernetes services.
	SystemCgroupsLimit() v1.ResourceList

	// GetNodeConfig returns a NodeConfig that is being used by the container manager.
	GetNodeConfig() NodeConfig

	// Status returns internal Status.
	Status() Status

	// NewPodContainerManager is a factory method which returns a podContainerManager object

	mockCtrl := gomock.NewController(t)
	defer mockCtrl.Finish()

	mockStatsProvider := statstest.NewMockProvider(mockCtrl)
	mockStatsProvider.EXPECT().GetNode().Return(node, nil).AnyTimes()
	mockStatsProvider.EXPECT().GetNodeConfig().Return(nodeConfig).AnyTimes()
	mockStatsProvider.EXPECT().GetPodCgroupRoot().Return(cgroupRoot).AnyTimes()
	mockStatsProvider.EXPECT().ListPodStats(ctx).Return(podStats, nil).AnyTimes()

	klog.V(2).InfoS("Starting stub container manager")
	return nil
}

func (cm *containerManagerStub) SystemCgroupsLimit() v1.ResourceList {
	return v1.ResourceList{}
}

func (cm *containerManagerStub) GetNodeConfig() NodeConfig {
	return NodeConfig{}
}

func (cm *containerManagerStub) GetMountedSubsystems() *CgroupSubsystems {
	return &CgroupSubsystems{}
}

	return cm, nil
}

func (cm *containerManagerImpl) SystemCgroupsLimit() v1.ResourceList {
	return v1.ResourceList{}
}

func (cm *containerManagerImpl) GetNodeConfig() NodeConfig {
	return NodeConfig{}
}

func (cm *containerManagerImpl) GetMountedSubsystems() *CgroupSubsystems {
	return &CgroupSubsystems{}
}