ProductIdCondition example

$this->assignConditions($productStream, $criteria);

        $sortings = $criteria->getSortings();
        if (empty($sortings)) {
            $this->assignSortings($productStream, $criteria);
        }
    }

    private function prepareSelectionStream(array $productStream, Criteria $criteria): void
    {
        $productIds = $this->getProductIds((int) $productStream['id']);
        $criteria->addBaseCondition(new ProductIdCondition($productIds));

        $sortings = $criteria->getSortings();
        if (empty($sortings)) {
            $this->assignSortings($productStream, $criteria);
        }
    }

    /** * @return int[] */
    private function getProductIds(int $productStreamId): array
    {