docs: public StylingPolicy getStylePolicy(ResultHierarchy hier, StyleLibrary stylelib) {
      Database db = ResultUtil.findDatabase(hier);
      AutomaticEvaluation.ensureClusteringResult(db, db);
      List<Clustering<? extends Model>> clusterings = Clustering.getClusteringResults(db);
      if(clusterings.isEmpty()) {
        throw new AbortException("No clustering result generated?!?");
      }
      return new ClusterStylingPolicy(clusterings.get(0), stylelib);
    }