Fatal error: Class wws\Shop\Catalog\ShopCatalogElasticsearch contains 1 abstract method and must therefore be declared abstract or implement the remaining methods (wws\Shop\Catalog\ShopCatalog::fetchProductSourcesByMpnOrEan) in /srv/ecom/html/LIB/business_logic/Shop/Catalog/ShopCatalogElasticsearch.php on line 14