}

type PodNetnsFinder interface {
	FindNetnsForPods(filter map[types.UID]*corev1.Pod) (PodToNetns, error)
}

type PodNetnsProcFinder struct {
	proc fs.FS
}

func NewPodNetnsProcFinder(proc fs.FS) *PodNetnsProcFinder {
	return &PodNetnsProcFinder{proc: proc}
}

func isNotNumber(r rune) bool {
	return r < '0' || r > '9'
}

	pod := &corev1.Pod{ObjectMeta: metav1.ObjectMeta{
		Name:      "foo",
		Namespace: "bar",
		UID:       types.UID("863b91d4-4b68-4efa-917f-4b560e3e86aa"),
	}}
	podUIDNetns, err := n.FindNetnsForPods(map[types.UID]*corev1.Pod{
		pod.UID: pod,
	})
	if err != nil {
		panic(err)
	}
	defer podUIDNetns.Close()

	if len(podUIDNetns) == 0 {
		t.Fatal("expected to find pod netns")
	}

}

func (s *NetServer) scanProcForPodsAndCache(pods map[types.UID]*corev1.Pod) error {
	// TODO: maybe remove existing uids in s.currentPodSnapshot from the filter set.
	res, err := s.podNs.FindNetnsForPods(pods)
	if err != nil {
		return err
	}

	for uid, wl := range res {
		s.currentPodSnapshot.UpsertPodCacheWithNetns(uid, wl)
	}
	return nil
}