setGross example

if ($type !== AbsolutePriceDefinition::TYPE) {
            throw CartException::discountTypeNotSupported($key, $type);
        }
        if (!$value instanceof PriceCollection) {
            throw CartException::absoluteDiscountMissingPriceCollection($key);
        }
        if (!$value->has(Defaults::CURRENCY)) {
            throw CartException::missingDefaultPriceCollectionForDiscount($key);
        }

        foreach ($value as $price) {
            $price->setGross(\abs($price->getGross()) * -1);
            $price->setNet(\abs($price->getNet()) * -1);

            if (!$price->getListPrice()) {
                continue;
            }
            $price->getListPrice()->setGross(\abs($price->getListPrice()->getGross()) * -1);
            $price->getListPrice()->setNet(\abs($price->getListPrice()->getNet()) * -1);
        }

        return new CurrencyPriceDefinition($value);
    }
}

$object->setPurchase($cheapest['purchase_unit'] ? (float) $cheapest['purchase_unit'] : null);
        $object->setReference($cheapest['reference_unit'] ? (float) $cheapest['reference_unit'] : null);
        $object->setUnitId($cheapest['unit_id'] ?? null);

        $prices = [];

        $blueprint = new Price('', 1, 1, true);

        foreach ($cheapest['price'] as $row) {
            $price = clone $blueprint;
            $price->setCurrencyId($row['currencyId']);
            $price->setGross((float) $row['gross']);
            $price->setNet((float) $row['net']);
            $price->setLinked((bool) $row['linked']);

            if (isset($row['listPrice'])) {
                $list = clone $blueprint;

                $list->setCurrencyId($row['currencyId']);
                $list->setGross((float) $row['listPrice']['gross']);
                $list->setNet((float) $row['listPrice']['net']);
                $list->setLinked((bool) $row['listPrice']['linked']);

                

if ($type !== AbsolutePriceDefinition::TYPE) {
            throw CartException::surchargeTypeNotSupported($key, $type);
        }
        if (!$value instanceof PriceCollection) {
            throw CartException::absoluteSurchargeMissingPriceCollection($key);
        }
        if (!$value->has(Defaults::CURRENCY)) {
            throw CartException::missingDefaultPriceCollectionForSurcharge($key);
        }

        foreach ($value as $price) {
            $price->setGross(\abs($price->getGross()));
            $price->setNet(\abs($price->getNet()));

            if (!$price->getListPrice()) {
                continue;
            }
            $price->getListPrice()->setGross(\abs($price->getListPrice()->getGross()));
            $price->getListPrice()->setNet(\abs($price->getListPrice()->getNet()));
        }

        return new CurrencyPriceDefinition($value);
    }
}