docs: protected void makeStyleResult(StyleLibrary stylelib) {
      final Database db = ResultUtil.findDatabase(hier);
      stylelibrary = stylelib;
      List<Clustering<? extends Model>> clusterings = Clustering.getClusteringResults(db);
      if(!clusterings.isEmpty()) {
        stylepolicy = new ClusterStylingPolicy(clusterings.get(0), stylelib);
      }
      else {
        Clustering<Model> c = generateDefaultClustering();
        stylepolicy = new ClusterStylingPolicy(c, stylelib);
      }
    }