public function storeNewCartData($cartData)
    {
        // Set id of the item to be used for updates later
        foreach ($cartData['items'] as $key => $item) {
            $cartData['items'][$key]['id'] = $key + 1;
        }

        // We use static number 1 as the cart id
        session([
            $this->sessionKey => array_merge($cartData, ['id' => 1]),
        ]);
    }