podHandler, _ := pods.Informer().AddEventHandler(cache.ResourceEventHandlerFuncs{
		AddFunc:    g.addPod,
		UpdateFunc: g.updatePod,
		DeleteFunc: g.deletePod,
	})

	pvsHandler, _ := pvs.Informer().AddEventHandler(cache.ResourceEventHandlerFuncs{
		AddFunc:    g.addPV,
		UpdateFunc: g.updatePV,
		DeleteFunc: g.deletePV,
	})

	attachHandler, _ := attachments.Informer().AddEventHandler(cache.ResourceEventHandlerFuncs{

// with the key in src.
func Copy[M1 ~map[K]V, M2 ~map[K]V, K comparable, V any](dst M1, src M2) {
	for k, v := range src {
		dst[k] = v
	}
}

// DeleteFunc deletes any key/value pairs from m for which del returns true.
func DeleteFunc[M ~map[K]V, K comparable, V any](m M, del func(K, V) bool) {
	for k, v := range m {
		if del(k, v) {
			delete(m, k)
		}
	}

	if e.UpdateFunc != nil {
		e.UpdateFunc(Extract[T](oldObj), Extract[T](newObj))
	}
}

func (e EventHandler[T]) OnDelete(obj interface{}) {
	if e.DeleteFunc != nil {
		e.DeleteFunc(Extract[T](obj))
	}
}

var _ cache.ResourceEventHandler = EventHandler[Object]{}

type Shutdowner interface {
	ShutdownHandlers()
}

}

func TestDeleteFunc(t *testing.T) {
	mc := Clone(m1)
	DeleteFunc(mc, func(int, int) bool { return false })
	if !Equal(mc, m1) {
		t.Errorf("DeleteFunc(%v, true) = %v, want %v", m1, mc, m1)
	}
	DeleteFunc(mc, func(k, v int) bool { return k > 3 })
	want := map[int]int{1: 2, 2: 4}
	if !Equal(mc, want) {
		t.Errorf("DeleteFunc result = %v, want %v", mc, want)
	}
}

var n map[int]int

	// m3 is: map[one:[100 2 3] two:[4 5 6]]
	// m4 is: map[one:[100 2 3] two:[4 5 6]]
}

func ExampleDeleteFunc() {
	m := map[string]int{
		"one":   1,
		"two":   2,
		"three": 3,
		"four":  4,
	}
	maps.DeleteFunc(m, func(k string, v int) bool {
		return v%2 != 0 // delete odd values
	})
	fmt.Println(m)
	// Output:
	// map[four:4 two:2]
}

func ExampleEqual() {
	m1 := map[int]string{
		1:    "one",

		},
		UpdateFunc: func(old, cur *corev1.Pod) {
			q.Push(func() error {
				if old.GetResourceVersion() != cur.GetResourceVersion() {
					return handlers.updated(cur)
				}
				return nil
			})
		},
		DeleteFunc: func(pod *corev1.Pod) {
			q.Push(func() error {
				return handlers.deleted(pod)
			})
		},
	})

	return &podController{
		q:        q,
		informer: informer,
	}
}

	svi.Informer().AddEventHandler(cache.ResourceEventHandlerFuncs{
		AddFunc: func(obj interface{}) {
			h.addSV(obj)
		},
		UpdateFunc: func(oldObj, newObj interface{}) {
			h.updateSV(oldObj, newObj)
		},
		DeleteFunc: func(obj interface{}) {
			h.deleteSV(obj)
		}})
	return h

	}

	_, _ = endpointSliceInformer.Informer().AddEventHandlerWithResyncPeriod(
		cache.ResourceEventHandlerFuncs{
			AddFunc:    result.handleAddEndpointSlice,
			UpdateFunc: result.handleUpdateEndpointSlice,
			DeleteFunc: result.handleDeleteEndpointSlice,
		},
		resyncPeriod,
	)

	return result
}

// RegisterEventHandler registers a handler which is called on every endpoint slice change.

			// Note that the reader parses the quoted record "" as an empty string,
			// and the writer turns that into an empty line, which the reader skips over.
			// Filter those out to avoid false positives.
			records = slices.DeleteFunc(records, func(record []string) bool {
				return len(record) == 1 && record[0] == ""
			})
			// The reader uses nil when returning no records at all.
			if len(records) == 0 {
				records = nil
			}

					return false
				}
			},
			Handler: cache.ResourceEventHandlerFuncs{
				AddFunc:    sched.addPodToCache,
				UpdateFunc: sched.updatePodInCache,
				DeleteFunc: sched.deletePodFromCache,
			},
		},
	); err != nil {
		return err
	}
	handlers = append(handlers, handlerRegistration)

	// unscheduled pod queue