docs: private boolean isReferenceResult(Clustering<?> t) {
      // FIXME: don't hard-code strings
      return "bylabel-clustering".equals(t.getShortName()) //
          || "bymodel-clustering".equals(t.getShortName()) //
          || "allinone-clustering".equals(t.getShortName()) //
          || "allinnoise-clustering".equals(t.getShortName());
    }