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