docs: protected void makeOlder(long timeDifference, double negLambda) {
          if (timeDifference == 0) {
              return;
          }
  
          //double weightFactor = AuxiliaryFunctions.weight(negLambda, timeDifference);
          assert (negLambda < 0);
          assert (timeDifference > 0);
          double weightFactor = Math.pow(2.0, negLambda * timeDifference);
  
          this.N *= weightFactor;
          for (int i = 0; i < LS.length; i++) {
              LS[i] *= weightFactor;
              SS[i] *= weightFactor;
          }
      }