code: func PodKey(pod *v1.Pod) string {
  	return fmt.Sprintf("%v/%v", pod.Namespace, pod.Name)
  }
docs: // PodKey returns a key unique to the given pod within a cluster.
  // It's used so we consistently use the same key scheme in this module.
  // It does exactly what cache.MetaNamespaceKeyFunc would have done
  // except there's not possibility for error since we know the exact type.