syncHandler func(groupVersion schema.GroupVersion) error

	syncedInitialSet chan struct{}

	// queue is where incoming work is placed to de-dup and to allow "easy" rate limited requeues on errors
	// this is actually keyed by a groupVersion
	queue workqueue.TypedRateLimitingInterface[schema.GroupVersion]
}

	"k8s.io/utils/clock"
)

// WorkQueue allows queuing items with a timestamp. An item is
// considered ready to process if the timestamp has expired.
type WorkQueue interface {
	// GetWork dequeues and returns all ready items.
	GetWork() []types.UID
	// Enqueue inserts a new item or overwrites an existing item.
	Enqueue(item types.UID, delay time.Duration)
}

type basicWorkQueue struct {
	clock clock.Clock

        // device. Device attribute is used to infer the appropriate sharding
        // within TPUs for this op.
        // TODO(b/183598857): Use explicit sharding ops from the front-end.
        // For example, dequeue ops generated by
        // tensorflow/python/tpu/tpu_feed.py
        if (!tensorflow::IsTPUReplicatedCore(attr.getValue()) &&
            !isa<tf_device::LaunchOp>(op)) {
          op->removeAttr(kDeviceAttr);
        }

					// queue ourselves on the global channel
					select {
					case <-c:
					case <-d:
					}
				}
			}()
		}
		for i := 0; i < messages; i++ {
			// wake each goroutine up, forcing it to dequeue and then enqueue
			// on the global channel.
			for _, d := range a {
				d <- true
			}
		}
	})

	}
	q.elems = newElems
	q.head = 0
}

func (q *queue) enqueue(e any) {
	if q.len+1 > q.cap() {
		q.grow()
	}
	i := (q.head + q.len) % q.cap()
	q.elems[i] = e
	q.len++
}

func (q *queue) dequeue() (any, bool) {
	if q.len == 0 {
		return nil, false
	}
	e := q.elems[q.head]
	q.elems[q.head] = nil
	q.head = (q.head + 1) % q.cap()
	q.len--
	return e, true
}

func (q *queue) peek() (any, bool) {

	if !ok {
		return nil
	}
	if match, ok := a.keyedItems[key]; ok {
		return match
	}
	// keep keying items until we either find a match or run out of unkeyed items
	for len(a.unkeyedItems) > 0 {
		// dequeue an unkeyed item
		item := a.unkeyedItems[0]
		a.unkeyedItems = a.unkeyedItems[1:]

		// key the item
		mitem, ok := item.(map[string]interface{})
		if !ok {
			continue
		}

	sorted := []*delayTask{t1, t2, t3, t4}
	// fill in an unsorted order
	unsorted := []*delayTask{t4, t2, t3, t1}
	for _, task := range unsorted {
		heap.Push(pq, task)
	}

	// dequeue should be in order
	for i, task := range sorted {
		peeked := pq.Peek()
		popped := heap.Pop(pq)
		if task != popped {
			t.Fatalf("pop %d was not in order", i)
		}
		if peeked != popped {

		return
	}

	for i := 0; i < workers; i++ {
		go wait.UntilWithContext(ctx, cc.worker, time.Second)
	}

	<-ctx.Done()
}

// worker runs a thread that dequeues CSRs, handles them, and marks them done.
func (cc *CertificateController) worker(ctx context.Context) {
	for cc.processNextWorkItem(ctx) {
	}
}

		[]float64{.01, .1, 1, 3, 5, 10, 20, 30},
	)

	proxiesQueueTime = monitoring.NewDistribution(
		"pilot_proxy_queue_time",
		"Time in seconds, a proxy is in the push queue before being dequeued.",
		[]float64{.1, .5, 1, 3, 5, 10, 20, 30},
	)

	pushTriggers = monitoring.NewSum(
		"pilot_push_triggers",
		"Total number of times a push was triggered, labeled by reason for the push.",
	)

	key, err := controller.KeyFunc(obj)
	if err != nil {
		utilruntime.HandleError(err)
		return
	}
	tc.queue.Add(key)
}

// worker runs a thread that dequeues secrets, handles them, and marks them done.
func (tc *TokenCleaner) worker(ctx context.Context) {
	for tc.processNextWorkItem(ctx) {
	}
}