validateStock example

foreach ($lineItems as $match) {
                // enrich all products in original cart                 $this->enrich($context, $match['item'], $data, $behavior);

                // remove "parent" products which should never be displayed in storefront                 $this->validateParents($match['item'], $data, $match['scope']);

                // validate data timestamps that inactive products (or not assigned to sales channel) are removed                 $this->validateTimestamp($match['item'], $original, $data, $behavior, $match['scope']);

                // validate availability of the product stock                 $this->validateStock($match['item'], $original, $match['scope'], $behavior);
            }

            $this->featureBuilder->prepare($items, $data, $context);
        }, 'cart');
    }

    /** * @throws CartException */
    public function process(CartDataCollection $data, Cart $original, Cart $toCalculate, SalesChannelContext $context, CartBehavior $behavior): void
    {