public function testNewEmptyImportedURLAttachmentItemGroup() { $key = API::groupCreateItem(self::$config['ownedPrivateGroupID'], "book", $this, 'key'); $xml = API::groupCreateAttachmentItem(self::$config['ownedPrivateGroupID'], "imported_url", [], $key, $this); return API::parseDataFromAtomEntry($xml); }