private function registerLogLevels()
    {
        $this->singleton(Contracts\Utilities\LogLevels::class, function ($app) {
            /**
             * @var  \Illuminate\Config\Repository       $config
             * @var  \Illuminate\Translation\Translator  $translator
             */
            $config     = $app['config'];
            $translator = $app['translator'];

            return new Utilities\LogLevels($translator, $config->get('log-viewer.locale'));
        });
    }