code: public final void record(final String name,
                             final Histogram histo,
                             final String xtratag) {
      record(name + "_50pct", histo.percentile(50), xtratag);
      record(name + "_75pct", histo.percentile(75), xtratag);
      record(name + "_90pct", histo.percentile(90), xtratag);
      record(name + "_95pct", histo.percentile(95), xtratag);
    }
docs: Records a number of data points from a {@link Histogram}.
  @param name The name of the metric.
  @param histo The histogram to collect data points from.
  @param xtratag An extra tag ({@code name=value}) to add to those
  data points (ignored if {@code null}).
  @throws IllegalArgumentException if {@code xtratag != null} and it
  doesn't follow the {@code name=value} format.