* @param name The name of the histogram
* @param desc Description of the data.
* @return a new MutableQuantile
*/
public MetricMutableQuantiles newQuantile(String name, String desc) {
MetricMutableQuantiles histo = new MetricMutableQuantiles(name, desc);
return addNewMetricIfAbsent(name, histo, MetricMutableQuantiles.class);
}