public function exportIndex(
        Manager $manager,
        $filename,
        $types,
        $chunkSize,
        OutputInterface $output,
        $maxLinesInFile = 300000
    ) {

        $search = new Search();
        $search->addQuery(new MatchAllQuery());
        $search->setSize($chunkSize);
        $search->addSort(new FieldSort('_doc'));

        $queryParameters = [
                '_source' => true,
                'scroll' => '10m',
            ];

        $searchResults = $manager->search($types, $search->toArray(), $queryParameters);

        $results = new RawIterator(
            $searchResults,
            $manager,
            [
                'duration' => $queryParameters['scroll'],
                '_scroll_id' => $searchResults['_scroll_id'],
            ]
        );

        $progress = new ProgressBar($output, $results->count());
        $progress->setRedrawFrequency(100);
        $progress->start();

        $counter = $fileCounter = 0;
        $count = $this->getFileCount($results->count(), $maxLinesInFile, $fileCounter);

        $date = date(\DateTime::ISO8601);
        $metadata = [
            'count' => $count,
            'date' => $date,
        ];

        $filename = str_replace('.json', '', $filename);
        $writer = $this->getWriter($this->getFilePath($filename.'.json'), $metadata);

        $file = [];
        foreach ($results as $data) {
            if ($counter >= $maxLinesInFile) {
                $writer->finalize();
                $writer = null;
                $fileCounter++;
                $count = $this->getFileCount($results->count(), $maxLinesInFile, $fileCounter);
                $metadata = [
                    'count' => $count,
                    'date' => $date,
                ];
                $writer = $this->getWriter($this->getFilePath($filename."_".$fileCounter.".json"), $metadata);
                $counter = 0;
            }

            $doc = array_intersect_key($data, array_flip(['_id', '_type', '_source']));
            $writer->push($doc);
            $file[] = $doc;
            $progress->advance();
            $counter++;
        }

        $writer->finalize();
        $progress->finish();
        $output->writeln('');
    }