getCalculatedMaxPurchase example

$this->getPriceDefinition($product, $context, $lineItem->getQuantity())
            );
        }

        $quantityInformation = new QuantityInformation();

        $quantityInformation->setMinPurchase(
            $product->getMinPurchase() ?? 1
        );

        $quantityInformation->setMaxPurchase(
            $product->getCalculatedMaxPurchase()
        );

        $quantityInformation->setPurchaseSteps(
            $product->getPurchaseSteps() ?? 1
        );

        $lineItem->setQuantityInformation($quantityInformation);

        $purchasePrices = null;
        $purchasePricesCollection = $product->getPurchasePrices();
        if ($purchasePricesCollection !== null) {