mergePartFiles example

$progress->setInvalidRecordsLogId($invalidRecordsProgress->getLogId());
        }

        // importing the file is complete         if ($this->reader->getOffset() === $this->filesystem->fileSize($path)) {
            if ($this->logEntity->getInvalidRecordsLog() instanceof ImportExportLogEntity) {
                /** @var ImportExportLogEntity $invalidLog */
                $invalidLog = $this->logEntity->getInvalidRecordsLog();
                $invalidRecordsProgress ??= $this->importExportService->getProgress($invalidLog->getId(), $invalidLog->getRecords());

                // complete invalid records export                 $this->mergePartFiles($invalidLog, $invalidRecordsProgress);

                $invalidRecordsProgress->setState(Progress::STATE_SUCCEEDED);
                $this->importExportService->saveProgress($invalidRecordsProgress);
            }

            $progress->setState($invalidRecordsProgress === null ? Progress::STATE_SUCCEEDED : Progress::STATE_FAILED);
        }

        $this->importExportService->saveProgress($progress, $overallResults);

        return $progress;
    }