// Submitted by Robin H. Johnson <******@****.***>
*.digitaloceanspaces.com

// dnstrace.pro : https://dnstrace.pro/
// Submitted by Chris Partridge <chris@partridge.tech>
bci.dnstrace.pro

// Dynu.com : https://www.dynu.com/
// Submitted by Sue Ye <******@****.***>
ddnsfree.com
ddnsgeek.com
giize.com
gleeze.com
kozow.com

// `api` label values.
func getHistogramMetrics(hist *prometheus.HistogramVec, desc MetricDescription, toLowerAPILabels bool) []MetricV2 {
	ch := make(chan prometheus.Metric)
	go func() {
		defer xioutil.SafeClose(ch)
		// Collects prometheus metrics from hist and sends it over ch
		hist.Collect(ch)
	}()

	// Converts metrics received into internal []Metric type