docs: @Override
      public IndexSetConfig save(IndexSetConfig indexSetConfig) {
          final WriteResult<IndexSetConfig, ObjectId> writeResult = collection.save(indexSetConfig);
          final IndexSetConfig savedObject = writeResult.getSavedObject();
  
          final IndexSetCreatedEvent createdEvent = IndexSetCreatedEvent.create(savedObject);
          clusterEventBus.post(createdEvent);
  
          return savedObject;
      }