func (a containerStatusbyCreatedList) Swap(i, j int) { a[i], a[j] = a[j], a[i] }
func (a containerStatusbyCreatedList) Less(i, j int) bool {
	return a[i].CreatedAt.After(a[j].CreatedAt)
}

func newPodContainerDeletor(runtime kubecontainer.Runtime, containersToKeep int) *podContainerDeletor {
	buffer := make(chan kubecontainer.ContainerID, containerDeletorBufferLimit)
	go wait.Until(func() {
		for {
			id := <-buffer

	containerGC, err := kubecontainer.NewContainerGC(klet.containerRuntime, containerGCPolicy, klet.sourcesReady)
	if err != nil {
		return nil, err
	}
	klet.containerGC = containerGC
	klet.containerDeletor = newPodContainerDeletor(klet.containerRuntime, max(containerGCPolicy.MaxPerPodContainer, minDeadContainerInPod))

	// setup imageManager