docs: public ClassificationModel attachClassification(GraphRewrite event, Rule rule, FileModel fileModel, String categoryId, String classificationTitle, String description)
      {
          Traversal<?, ?> classificationTraversal = getQuery().traverse(g -> g.has(ClassificationModel.CLASSIFICATION, classificationTitle)).getRawTraversal();
          ClassificationModel classification = getUnique(classificationTraversal);
          if (classification == null)
          {
              classification = create();
              classification.setClassification(classificationTitle);
              classification.setDescription(description);
              classification.setEffort(0);
  
              IssueCategoryModel cat = IssueCategoryRegistry.loadFromGraph(event.getGraphContext(), categoryId);
              classification.setIssueCategory(cat);
  
              classification.setRuleID(rule.getId());
              if (fileModel instanceof DuplicateArchiveModel)
              {
                  fileModel = ((DuplicateArchiveModel) fileModel).getCanonicalArchive();
              }
              classification.addFileModel(fileModel);
              if (fileModel instanceof SourceFileModel)
                  ((SourceFileModel) fileModel).setGenerateSourceReport(true);
  
              ClassificationServiceCache.cacheClassificationFileModel(event, classification, fileModel, true);
              return classification;
          }
          else
          {
              if (!StringUtils.equals(description, classification.getDescription()))
                  LOG.warning("The description of the newly attached classification differs from the same-titled existing one, so the old description is being changed."
                          + System.lineSeparator()+"   Clsf title: " + classification.getClassification()
                          + System.lineSeparator()+"   Old desc: " + classification.getDescription()
                          + System.lineSeparator()+"   New desc: " + description);
              classification.setDescription(description);
          }
  
          return attachClassification(event, classification, fileModel);
      }