manyValuesAccumulatorByAddAllStatsAccumulator = new StatsAccumulator();
    manyValuesAccumulatorByAddAllStatsAccumulator.addAll(
        statsAccumulatorOf(MANY_VALUES.subList(0, MANY_VALUES.size() / 2)));
    manyValuesAccumulatorByAddAllStatsAccumulator.addAll(
        statsAccumulatorOf(MANY_VALUES.subList(MANY_VALUES.size() / 2, MANY_VALUES.size())));

    integerManyValuesAccumulatorByAddAllIterable = new StatsAccumulator();