// are registered (in n.registeredHandlers); this can cause the dynamic filtering to miss events
	reg, err := n.informer.AddEventHandler(fh)
	if err != nil {
		// Should only happen if its already stopped. We should exit early.
		return
	}
	n.registeredHandlers = append(n.registeredHandlers, handlerRegistration{registration: reg, handler: h})
}

	// otherwise logging functions will access a nil sink and
	// panic.
	logger klog.Logger

	// registeredHandlers contains the registrations of all handlers. It's used to check if all handlers have finished syncing before the scheduling cycles start.
	registeredHandlers []cache.ResourceEventHandlerRegistration
}

func (sched *Scheduler) applyDefaultHandlers() {
	sched.SchedulePod = sched.schedulePod

func (sched *Scheduler) WaitForHandlersSync(ctx context.Context) error {
	return wait.PollUntilContextCancel(ctx, syncedPollPeriod, true, func(ctx context.Context) (done bool, err error) {
		for _, handler := range sched.registeredHandlers {
			if !handler.HasSynced() {
				return false, nil
			}
		}
		return true, nil
	})
}

// addAllEventHandlers is a helper function used in tests and in Scheduler