@Override
    public String toString() {
      MoreObjects.ToStringHelper helper =
        MoreObjects.toStringHelper(this).add("numResults", stats.getN())
          .add("minTime", stats.getMin()).add("meanTime", stats.getMean())
          .add("maxTime", stats.getMax()).add("25th", stats.getPercentile(25))
          .add("50th", stats.getPercentile(50)).add("75th", stats.getPercentile(75))
          .add("90th", stats.getPercentile(90)).add("95th", stats.getPercentile(95))
          .add("99th", stats.getPercentile(99)).add("99.9th", stats.getPercentile(99.9))
          .add("99.99th", stats.getPercentile(99.99)).add("traces", traces);
      return helper.toString();
    }
Add a result to this aggregate result.
@param time Time in nanoseconds
@param span Span. To be kept if the time taken was over 1 second
hbase-it/src/test/java/org/apache/hadoop/hbase/mttr/IntegrationTestMTTR.java