public function getDealItemsAsync($x_ebay_c_marketplace_id, $category_ids = null, $commissionable = null, $delivery_country = null, $limit = null, $offset = null)
    {
        return $this->getDealItemsAsyncWithHttpInfo($x_ebay_c_marketplace_id, $category_ids, $commissionable, $delivery_country, $limit, $offset)
            ->then(
                function ($response) {