Sylius\Bundle\GridBundle\Doctrine\ORM\DataSource::restrict PHP Method

    public function restrict($expression, $condition = DataSourceInterface::CONDITION_AND)
    {
        switch ($condition) {
            case DataSourceInterface::CONDITION_AND:
                $this->queryBuilder->andWhere($expression);
                break;
            case DataSourceInterface::CONDITION_OR:
                $this->queryBuilder->orWhere($expression);
                break;
        }
    }