docs: protected int widestDim(double[][] nodeRanges, double[][] universe) {
      final int classIdx = m_Instances.classIndex();
      double widest = 0.0;
      int w = -1;
      if (m_NormalizeNodeWidth) {
        for (int i = 0; i < nodeRanges.length; i++) {
          double newWidest = nodeRanges[i][WIDTH] / universe[i][WIDTH];
          if (newWidest > widest) {
            if (i == classIdx)
              continue;
            widest = newWidest;
            w = i;
          }
        }
      } else {
        for (int i = 0; i < nodeRanges.length; i++) {
          if (nodeRanges[i][WIDTH] > widest) {
            if (i == classIdx)
              continue;
            widest = nodeRanges[i][WIDTH];
            w = i;
          }
        }
      }
      return w;
    }