metricValues := newMetricValues(mg.descriptorMap)

	var err error
	if mg.IsBucketMetricsGroup() {
		err = mg.bucketLoader(GlobalContext, metricValues, mg.cache, mg.buckets)
	} else {
		err = mg.loader(GlobalContext, metricValues, mg.cache)
	}

	// There is no way to handle errors here, so we panic the current goroutine