/** * Write item data to csv export file * * @param \Magento\Framework\Object $item * @param \Magento\Framework\Filesystem\File\WriteInterface $stream * @return void */ protected function _exportCsvItem(\Magento\Framework\Object $item, \Magento\Framework\Filesystem\File\WriteInterface $stream) { $row = []; foreach ($this->getColumns() as $column) { if (!$column->getIsSystem()) { $row[] = $column->getRowFieldExport($item); } } $stream->writeCsv($row); }