func podInOrdinalRange(pod *v1.Pod, set *apps.StatefulSet) bool {
	ordinal := getOrdinal(pod)
	return ordinal >= getStartOrdinal(set) && ordinal <= getEndOrdinal(set)
}

// getPodName gets the name of set's child Pod with an ordinal index of ordinal
func getPodName(set *apps.StatefulSet, ordinal int) string {
	return fmt.Sprintf("%s-%d", set.Name, ordinal)
}