// Create creates and applies the cgroup configurations on the cgroup.
	// It just creates the leaf cgroups.
	// It expects the parent cgroup to already exist.
	Create(*CgroupConfig) error
	// Destroy the cgroup.
	Destroy(*CgroupConfig) error
	// Update cgroup configuration.
	Update(*CgroupConfig) error
	// Validate checks if the cgroup is valid
	Validate(name CgroupName) error
	// Exists checks if the cgroup already exists

}

// CgroupSubsystems holds information about the mounted cgroup subsystems
type CgroupSubsystems struct {
	// Cgroup subsystem mounts.
	// e.g.: "/sys/fs/cgroup/cpu" -> ["cpu", "cpuacct"]
	Mounts []libcontainercgroups.Mount

	// Cgroup subsystem to their mount location.
	// e.g.: "cpu" -> "/sys/fs/cgroup/cpu"
	MountPoints map[string]string
}

    data class ForPlugin(
        val id: String,
        val implementationClass: String,
        override val extension: ExtensionSpec
    ) : PluginDependencySpecAccessor()

    data class ForGroup(
        val id: String,
        override val extension: ExtensionSpec
    ) : PluginDependencySpecAccessor()
}


private

// the stats of the terminated containers removed and all containerInfos assembled by pod cgroup key.
// the first return map is container cgroup name <-> ContainerInfo and
// the second return map is pod cgroup key <-> ContainerInfo.
// A ContainerInfo is considered to be of a terminated container if it has an
// older CreationTime and zero CPU instantaneous and memory RSS usage.

	// Check if Cgroup-root actually exists on the node
	if nodeConfig.CgroupsPerQOS {
		// this does default to / when enabled, but this tests against regressions.
		if nodeConfig.CgroupRoot == "" {
			return nil, fmt.Errorf("invalid configuration: cgroups-per-qos was specified and cgroup-root was not specified. To enable the QoS cgroup hierarchy you need to specify a valid cgroup-root")
		}

}

// GetCgroupStats returns the stats of the cgroup with the cgroupName. Note that
// this function doesn't generate filesystem stats.
func (p *Provider) GetCgroupStats(cgroupName string, updateStats bool) (*statsapi.ContainerStats, *statsapi.NetworkStats, error) {
	info, err := getCgroupInfo(p.cadvisor, cgroupName, updateStats)
	if err != nil {
		return nil, nil, fmt.Errorf("failed to get cgroup stats for %q: %v", cgroupName, err)
	}

		p := "/sys/fs/cgroup/memory/memory.memsw.limit_in_bytes"
		if isCgroup2UnifiedMode() {
			// memory.swap.max does not exist in the cgroup root, so we check /sys/fs/cgroup/<SELF>/memory.swap.max
			_, unified, err := cgroups.ParseCgroupFileUnified("/proc/self/cgroup")
			if err != nil {
				klog.V(5).ErrorS(fmt.Errorf("failed to parse /proc/self/cgroup: %w", err), warn)
				return
			}

func TestPrepareForCreate(t *testing.T) {
	ctx := genericapirequest.NewDefaultContext()

	ns := "ns1"
	volumeDataSource := makeDataSource(coreGroup, pvcKind, "my-vol")
	volumeDataSourceRef := makeDataSourceRef(coreGroup, pvcKind, "my-vol", nil)
	xnsVolumeDataSourceRef := makeDataSourceRef(coreGroup, pvcKind, "my-vol", &ns)
	snapshotDataSource := makeDataSource(snapGroup, snapKind, "my-snap")

tasks.configureCICrossVersionTestDistributionLifecycleTasks()

val ciGroup = "CI Lifecycle"

/**
 * Basic compile and check lifecycle tasks.
 */
fun TaskContainer.registerEarlyFeedbackLifecycleTasks() {
    register("compileAllBuild") {
        description = "Initialize CI Pipeline by priming the cache before fanning out"
        group = ciGroup
        dependsOn("compileAllProduction")
    }

        if (!getFinalizingSuccessors().isEmpty()) {
            // This node is a finalizer, decorate the current group to add finalizer behaviour
            NodeGroup oldGroup = getGroup();
            FinalizerGroup finalizerGroup = new FinalizerGroup(this, oldGroup);
            setGroup(finalizerGroup);
        }
    }