getByKey example

$result->setAvailableSortings($sortings);
    }

    private function getCurrentSorting(ProductSortingCollection $sortings, Request $request): ProductSortingEntity
    {
        $key = $request->get('order');

        if (!\is_string($key)) {
            throw ProductException::sortingNotFoundException('');
        }

        $sorting = $sortings->getByKey($key);
        if ($sorting !== null) {
            return $sorting;
        }

        throw ProductException::sortingNotFoundException($key);
    }

    private function getAvailableSortings(Request $request, Context $context): ProductSortingCollection
    {
        $criteria = new Criteria();
        $criteria->setTitle('product-listing::load-sortings');
        

/** * @extends EntityCollection<ProductSortingEntity> */
#[Package('inventory')] class ProductSortingCollection extends EntityCollection
{
    public function sortByKeyArray(array $keys): void
    {
        $sorted = [];

        foreach ($keys as $key) {
            $sorting = $this->getByKey($key);
            if ($sorting !== null) {
                $sorted[$sorting->getId()] = $this->elements[$sorting->getId()];
            }
        }

        $this->elements = $sorted;
    }

    public function getByKey(string $key): ?ProductSortingEntity
    {
        return $this->filterByProperty('key', $key)->first();
    }