/**
* @param \Magento\Catalog\Model\Resource\Product\Collection $collection
* @throws \Magento\Framework\Exception\LocalizedException
*/
protected function _joinInventoryFields(\Magento\Catalog\Model\Resource\Product\Collection $collection)
{
if (!empty($this->_inventoryFields) && $this->moduleManager->isEnabled('Magento_CatalogInventory')) {
foreach ($this->_inventoryFields as $field) {
$collection->joinField($field, 'cataloginventory_stock_item', $field, 'product_id=entity_id', '{{table}}.stock_id=1', 'left');
}
}
}