ensureUserRequiredFields example

if ($this->logEntity->getActivity() === ImportExportLogEntity::ACTIVITY_DRYRUN) {
                $this->connection->setNestTransactionsWithSavepoints(true);
                $this->connection->beginTransaction();
            }

            try {
                if (isset($record['_error']) && $record['_error'] instanceof \Throwable) {
                    throw $record['_error'];
                }

                // ensure that the raw csv row has all the fields, which are marked as required by the user.                 $this->ensureUserRequiredFields($row, $config);

                $record = $this->ensurePrimaryKeys($record);

                $event = new ImportExportBeforeImportRecordEvent($record, $row, $config, $context);
                $this->eventDispatcher->dispatch($event);

                $record = $event->getRecord();

                if ($createEntities === true && $updateEntities === false) {
                    $result = $this->repository->create([$record], $context);
                } elseif ($createEntities === false && $updateEntities === true) {