docs: public double invertedGenerationalDistancePlus(Front front, Front referenceFront) {
  
      double sum = 0.0;
      for (int i = 0 ; i < referenceFront.getNumberOfPoints(); i++) {
        sum += FrontUtils.distanceToClosestPoint(referenceFront.getPoint(i),
            front, new DominanceDistance());
      }
  
      // STEP 4. Divide the sum by the maximum number of points of the reference Pareto front
      return sum / referenceFront.getNumberOfPoints();
    }