metrics.UpdateInflightRequestMetrics(watermark.phase, readOnlyWatermark, mutatingWatermark)
	}, inflightUsageMetricUpdatePeriod, stopCh)
}

var initMaxInFlightOnce sync.Once

func initMaxInFlight(nonMutatingLimit, mutatingLimit int) {
	initMaxInFlightOnce.Do(func() {
		// Fetching these gauges is delayed until after their underlying metric has been registered
		// so that this latches onto the efficient implementation.

	defaultRequestWaitLimit time.Duration,
) http.Handler {
	if fcIfc == nil {
		klog.Warningf("priority and fairness support not found, skipping")
		return handler
	}
	initAPFOnce.Do(func() {
		initMaxInFlight(0, 0)
		// Fetching these gauges is delayed until after their underlying metric has been registered
		// so that this latches onto the efficient implementation.