metrics, err := legacyregistry.DefaultGatherer.Gather()
	if err != nil {
		t.Fatalf("Failed to gather metrics: %s", err)
	}
	for _, mf := range metrics {
		if mf.GetName() == name {
			for _, m := range mf.GetMetric() {
				h := m.GetHistogram()
				count += h.GetSampleCount()
				sum += h.GetSampleSum()
			}
			return
		}
	}
	t.Fatalf("metric not found: %v", name)
	return 0, 0

	if err != nil {
		return 0, fmt.Errorf("failed to gather metrics: %w", err)
	}
	for _, mf := range mfs {
		thisName := mf.GetName()
		if thisName != metricName {
			continue
		}
		metric := mf.GetMetric()[0]
		hist := metric.GetHistogram()
		if hist == nil {
			return 0, errors.New("dto.Metric has nil Histogram")
		}
		if hist.SampleCount == nil {
			return 0, errors.New("dto.Histogram has nil SampleCount")