cleanupCustomFields example

    /** * @param array<mixed> $customFieldAllowList */
    private function cleanupLineItem(LineItem $lineItem, array $customFieldAllowList): void
    {
        if ($lineItem->getCover()) {
            $lineItem->getCover()->setThumbnailsRo('');
        }

        $this->cleanupCustomFields($lineItem, $customFieldAllowList);

        foreach ($lineItem->getChildren() as $child) {
            $this->cleanupLineItem($child, $customFieldAllowList);
        }
    }

    /** * @param array<mixed> $customFieldAllowList */
    private function cleanupCustomFields(LineItem $lineItem, array $customFieldAllowList): void
    {