docs: public boolean hasRevisionSpecTopics() {
          for (final SpecTopic specTopic : getSpecTopics()) {
              if (specTopic.getRevision() != null) {
                  return true;
              }
          }
  
          for (final Level childLevel : getChildLevels()) {
              if (childLevel.hasRevisionSpecTopics()) {
                  return true;
              }
          }
  
          return false;
      }