protected function _getWishListId()
    {
        $this->_sWishId = null;
        // check if we have to set it here
        $oBasket = $this->getSession()->getBasket();
        foreach ($oBasket->getContents() as $oBasketItem) {
            if ($this->_sWishId = $oBasketItem->getWishId()) {
                // stop on first found
                break;
            }
        }

        return $this->_sWishId;
    }