indexArticle example

$criteria = new SearchCriteria($backlog['entity']);

            $repository = $registry->getRepository($criteria);

            if (!$repository instanceof EsAwareRepository) {
                continue;
            }

            $output->writeln(sprintf('Sync %s with id %s', $backlog['entity'], $backlog['entity_id']));

            if ($backlog['entity'] === Article::class) {
                $this->indexArticle($backlog['entity_id']);
            } else {
                $index = $this->getIndexName($repository->getDomainName());
                $indexer->indexEntities($index, $repository, [$backlog['entity_id']]);
            }
        }

        $ids = array_column($backlogs, 'id');

        $backlogService->cleanup($ids);

        return 0;
    }