presto-verifier/src/main/java/io/prestosql/verifier/HumanReadableEventClient.java/HumanReadableEventClient/formatBucket
class HumanReadableEventClient:    public static String formatBucket(double min, double max, QuantileDigest digest, long totalCount)
    {
        double p50 = sortableLongToDouble(digest.getQuantile(0.5));
        long count = (long) digest.getCount();
        double countRatio = 1.0 * count / totalCount;

        String maxValue = max == POSITIVE_INFINITY ? "inf" : format("%3.1f", max);

        return format("%3.1f - %s  (%4.2f) %6d  (%4.1f%%)", min, maxValue, p50, count, countRatio * 100);
    }