code: public long sizeOfEquivalentValueRange(final long value) {
          final int bucketIndex = getBucketIndex(value);
          final int subBucketIndex = getSubBucketIndex(value, bucketIndex);
          long distanceToNextValue =
                  (1L << ( unitMagnitude + ((subBucketIndex >= subBucketCount) ? (bucketIndex + 1) : bucketIndex)));
          return distanceToNextValue;
      }
docs: Get the size (in value units) of the range of values that are equivalent to the given value within the
  histogram's resolution. Where "equivalent" means that value samples recorded for any two
  equivalent values are counted in a common total count.
  
  @param value The given value
  @return The lowest value that is equivalent to the given value within the histogram's resolution.