Contao\CoreBundle\Framework\ContaoFramework::includeBasicClasses PHP Method

    private function includeBasicClasses()
    {
        foreach ($this->basicClasses as $class) {
            if (!class_exists($class, false)) {
                require_once __DIR__ . '/../Resources/contao/library/Contao/' . $class . '.php';
                class_alias('Contao\\' . $class, $class);
            }
        }
    }