code: public static LongStream hotspot(int lowerBound, int upperBound,
        double hotsetFraction, double hotOpnFraction, int events) {
      return generate(new HotspotIntegerGenerator(lowerBound,
          upperBound, hotsetFraction, hotOpnFraction), events);
    }
docs: Returns a sequence of events resembling a hotspot distribution where x% of operations access y%
  of data items. The parameters specify the bounds for the numbers, the percentage of the of the
  interval which comprises the hot set and the percentage of operations that access the hot set.
  Numbers of the hot set are always smaller than any number in the cold set. Elements from the
  hot set and the cold set are chose using a uniform distribution.
  
  @param lowerBound lower bound of the distribution
  @param upperBound upper bound of the distribution
  @param hotsetFraction percentage of data item
  @param hotOpnFraction percentage of operations accessing the hot set
  @param events the number of events in the distribution