logreporter/reporter.go
func (r *Reporter) Sample(name string, tags []string, dist instruments.Distribution) error {
	metric := fmt.Sprintf("%s|%s:p95=%v", name, strings.Join(tags, ","), dist.Quantile(0.95))
	r.metrics = append(r.metrics, metric)
	return nil
}
func (r *Reporter) Sample(name string, tags []string, dist instruments.Distribution) error {
	metric := fmt.Sprintf("%s|%s:p95=%v", name, strings.Join(tags, ","), dist.Quantile(0.95))
	r.metrics = append(r.metrics, metric)
	return nil
}
// Sample implements instruments.Reporter