public function buildPlaceholderItem(string $code, int $currencyPrecision): LineItem
    {
        // void duplicate codes with other items
        // that might not be from the promotion scope
        $uniqueKey = self::PLACEHOLDER_PREFIX . $code;

        $item = new LineItem($uniqueKey, $this->lineItemType, 1);
        $item->setLabel($uniqueKey);
        $item->setGood(false);

        // this is used to pass on the code for later usage
        $item->setPayload(['code' => $code]);

        // this is important to avoid any side effects when calculating the cart
        // a percentage of 0,00 will just do nothing
        $item->setPriceDefinition(new PercentagePriceDefinition(0, $currencyPrecision));

        return $item;
    }