prom, err := otelprom.New(promOpts...)
	if err != nil {
		return nil, err
	}

	opts := []metric.Option{metric.WithReader(prom)}
	opts = append(opts, knownMetrics.toHistogramViews()...)
	mp := metric.NewMeterProvider(opts...)
	otel.SetMeterProvider(mp)
	handler := promhttp.HandlerFor(gatherer, promhttp.HandlerOpts{})
	return handler, nil
}

// A Metric collects numerical observations.
type Metric interface {

	var want, got int64
	var wg sync.WaitGroup
	ready := make(chan *runtime.M)
	wg.Add(1)
	go func() {
		runtime.LockOSThread()
		want, got = runtime.WaitForSigusr1(r, w, func(mp *runtime.M) {
			ready <- mp
		})
		runtime.UnlockOSThread()
		wg.Done()
	}()
	waitingM := <-ready
	runtime.SendSigusr1(waitingM)

	timer := time.AfterFunc(time.Second, func() {

00000330  16 e9 70 89 e7 98 a8 f3  4a 81 d4 d8 ff 5f 48 6e  |..p.....J...._Hn|
00000340  60 c6 4a 07 c5 57 9c 22  25 3a 9f bf 7e 71 f3 0d  |`.J..W."%:..~q..|
00000350  71 e5 a5 d4 2b 6d 70 2f  c5 a3 17 03 03 00 99 b9  |q...+mp/........|
00000360  15 c7 70 bc 06 75 26 50  0f 22 90 43 99 25 0d 0f  |..p..u&P.".C.%..|
00000370  05 d3 ce e7 3c 53 fb 01  d4 d2 e8 fb b7 49 87 03  |....<S.......I..|

000001a0  90 02 10 55 85 49 48 89  d8 d6 4b 68 29 cb 28 66  |...U.IH...Kh).(f|
000001b0  1c d1 97 e6 a0 10 90 63  83 96 33 ee 5a 5a 5b 66  |.......c..3.ZZ[f|
000001c0  ca b3 0d be 6d 70 c5 de  fd 78 c8 f8 e1 c5 78 ef  |....mp...x....x.|
000001d0  07 2e 60 06 28 86 ed e6  bd 7b 37 33 0e 06 5e 06  |..`.(....{73..^.|
000001e0  fb 44 2b 96 16 fe 09 30  dc 03 53 bc c9 f9 6f 1e  |.D+....0..S...o.|