protected function addFormatter(&$manager, $model, $formatter)
    {
        // Get the config
        $config = (include $this->configPath . '/' . $model . '.php');

        if(!isset($config[$formatter]))
            return;

        $formatterClass = 'kriskbx\mikado\Formatters\\' . $formatter;

        if (is_array($config[$formatter]) && count($config[$formatter]) > 0) {
            $manager->add(new $formatterClass($config[$formatter]));
        }
    }