docs: protected ArrayModifiableDBIDs initialMedoids(DistanceQuery<V> distQ, DBIDs ids) {
      if(getLogger().isStatistics()) {
        getLogger().statistics(new StringStatistic(getClass().getName() + ".initialization", initializer.toString()));
      }
      Duration initd = getLogger().newDuration(getClass().getName() + ".initialization-time").begin();
      ArrayModifiableDBIDs medoids = DBIDUtil.newArray(initializer.chooseInitialMedoids(k, ids, distQ));
      getLogger().statistics(initd.end());
      if(medoids.size() != k) {
        throw new AbortException("Initializer " + initializer.toString() + " did not return " + k + " means, but " + medoids.size());
      }
      return medoids;
    }