public MutableTimeHistogram newTimeHistogram(String name, String desc) {
    MutableTimeHistogram histo = new MutableTimeHistogram(name, desc);
    return addNewMetricIfAbsent(name, histo, MutableTimeHistogram.class);
  }
Create a new histogram with time range counts.
@param name The name of the histogram
@param desc The description of the data in the histogram.
@return A new MutableTimeHistogram
hbase-hadoop-compat/src/main/java/org/apache/hadoop/metrics2/lib/DynamicMetricsRegistry.java