Fatal error: Uncaught Error: Call to undefined method Skeleton\ContentType::xml() in /home/devenirhke/www/src/Skeleton/ContentType.php:60 Stack trace: #0 /home/devenirhke/www/src/Skeleton/Page.php(33): Skeleton\ContentType::define('xml') #1 /home/devenirhke/www/src/Skeleton/Singleton.php(19): Skeleton\Page->__construct() #2 /home/devenirhke/www/index.php(37): Skeleton\Singleton::getInstance('\\Skeleton\\Page') #3 {main} thrown in /home/devenirhke/www/src/Skeleton/ContentType.php on line 60