class BucketSampler {

    public double getEqualsStdDev() {
        if (stdDev == null)
            throw new IllegalStateException("standard deviation not computed");
        return stdDev.getResult();
    }

      BucketSampler(int bucketCount, long estimatedInputs);
      BucketSampler(int maxSize, long estimatedInputs, boolean calculateStandardDeviation);

}