code: @Override
      public void setScale(IReaction reaction) {
          double bondLength = AverageBondLengthCalculator.calculateAverageBondLength(reaction);
          double scale = this.calculateScaleForBondLength(bondLength);
  
          // store the scale so that other components can access it
          this.rendererModel.getParameter(Scale.class).setValue(scale);
      }
docs: Set the scale for an IReaction. It calculates the average bond length
  of the model and calculates the multiplication factor to transform this
  to the bond length that is set in the RendererModel.
  @param reaction