commons-statistics-descriptive/src/main/java/org/apache/commons/statistics/descriptive/IntStatistics.java [616:681]:
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            break;
        case PRODUCT:
            stat = Statistics.getResultAsDoubleOrNull(product);
            break;
        case SKEWNESS:
            stat = getSkewness();
            break;
        case STANDARD_DEVIATION:
            stat = getStandardDeviation();
            break;
        case SUM:
            stat = Statistics.getResultAsBigIntegerOrNull(sum);
            break;
        case SUM_OF_LOGS:
            stat = Statistics.getResultAsDoubleOrNull(sumOfLogs);
            break;
        case SUM_OF_SQUARES:
            stat = Statistics.getResultAsBigIntegerOrNull(sumOfSquares);
            break;
        case VARIANCE:
            stat = getVariance();
            break;
        default:
            break;
        }
        if (stat != null) {
            return stat;
        }
        throw new IllegalArgumentException(UNSUPPORTED_STATISTIC + statistic);
    }

    /**
     * Gets the geometric mean.
     *
     * @return a geometric mean supplier (or null if unsupported)
     */
    private StatisticResult getGeometricMean() {
        if (sumOfLogs != null) {
            // Return a function that has access to the count and sumOfLogs
            return () -> GeometricMean.computeGeometricMean(count, sumOfLogs);
        }
        return null;
    }

    /**
     * Gets the kurtosis.
     *
     * @return a kurtosis supplier (or null if unsupported)
     */
    private StatisticResult getKurtosis() {
        if (moment instanceof SumOfFourthDeviations) {
            return new Kurtosis((SumOfFourthDeviations) moment)
                .setBiased(config.isBiased())::getAsDouble;
        }
        return null;
    }

    /**
     * Gets the mean.
     *
     * @return a mean supplier (or null if unsupported)
     */
    private StatisticResult getMean() {
        if (sum != null) {
            // Return a function that has access to the count and sum
            final Int128 s = sum.getSum();
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commons-statistics-descriptive/src/main/java/org/apache/commons/statistics/descriptive/LongStatistics.java [594:659]:
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            break;
        case PRODUCT:
            stat = Statistics.getResultAsDoubleOrNull(product);
            break;
        case SKEWNESS:
            stat = getSkewness();
            break;
        case STANDARD_DEVIATION:
            stat = getStandardDeviation();
            break;
        case SUM:
            stat = Statistics.getResultAsBigIntegerOrNull(sum);
            break;
        case SUM_OF_LOGS:
            stat = Statistics.getResultAsDoubleOrNull(sumOfLogs);
            break;
        case SUM_OF_SQUARES:
            stat = Statistics.getResultAsBigIntegerOrNull(sumOfSquares);
            break;
        case VARIANCE:
            stat = getVariance();
            break;
        default:
            break;
        }
        if (stat != null) {
            return stat;
        }
        throw new IllegalArgumentException(UNSUPPORTED_STATISTIC + statistic);
    }

    /**
     * Gets the geometric mean.
     *
     * @return a geometric mean supplier (or null if unsupported)
     */
    private StatisticResult getGeometricMean() {
        if (sumOfLogs != null) {
            // Return a function that has access to the count and sumOfLogs
            return () -> GeometricMean.computeGeometricMean(count, sumOfLogs);
        }
        return null;
    }

    /**
     * Gets the kurtosis.
     *
     * @return a kurtosis supplier (or null if unsupported)
     */
    private StatisticResult getKurtosis() {
        if (moment instanceof SumOfFourthDeviations) {
            return new Kurtosis((SumOfFourthDeviations) moment)
                .setBiased(config.isBiased())::getAsDouble;
        }
        return null;
    }

    /**
     * Gets the mean.
     *
     * @return a mean supplier (or null if unsupported)
     */
    private StatisticResult getMean() {
        if (sum != null) {
            // Return a function that has access to the count and sum
            final Int128 s = sum.getSum();
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