code: func (nc *Controller) evictPods(node *v1.Node) bool {
  	nc.evictorLock.Lock()
  	defer nc.evictorLock.Unlock()
  	return nc.zonePodEvictor[utilnode.GetZoneKey(node)].Add(node.Name, string(node.UID))
  }
docs: // evictPods queues an eviction for the provided node name, and returns false if the node is already
  // queued for eviction.