public function getShopLogo()
    {
        if (is_null($this->_sShopLogo)) {
            $sLogoImage = $this->getConfig()->getConfigParam('sShopLogo');
            if (empty($sLogoImage)) {
                $editionSelector = new EditionSelector();
                $sLogoImage = "logo_" . strtolower($editionSelector->getEdition()) . ".png";
            }

            $this->setShopLogo($sLogoImage);
        }

        return $this->_sShopLogo;
    }