Jarves\Cache\Backend\Memcached::testConfig PHP Method

    public function testConfig($config)
    {
        if (!(class_exists('Memcache') || class_exists('Memcached'))) {
            throw new \Exception('The php module memcache or memcached is not activated in your PHP environment.');
        }
        if (!$config['servers']) {
            throw new \Exception('No servers set.');
        }
        return true;
    }