/**
* @param param number of elements
* @param param2 exponent
* @return Zipf distribution
*/
ZipfDistribution getZipfDistribution(int param, double param2) {
if (zipf == null || zipf.getNumberOfElements() != param || zipf.getExponent() != param2)
zipf = new ZipfDistributionImpl(param, param2);
return zipf;
}
