App\Http\Controllers\Laralum\Laralum::downloadFile PHP Method

    public static function downloadFile($file_name)
    {
        # Add a new download to the file if it's a document
        if (Laralum::isDocument($file_name)) {
            Laralum::addDownload($file_name);
        }
        return response()->download(storage_path('app/' . $file_name));
    }