static public function registerDefaults() {
		if (self::$registeredStatic) {
			require_once __DIR__ . '/Exceptions/RegisterationFailed.php';
			throw new RegistrationFailed('Is already registered');
		}
		
		$loader = new static();
		$loader->registerNamespace('ZExt', __DIR__ . '/..');
		$loader->register();
		
		self::$registeredStatic = true;
		
		return $loader;
	}