public function getDownloadURL()
    {
        $app = Application::getFacadeApplication();
        $urlResolver = $app->make(ResolverManagerInterface::class);
        $c = Page::getCurrentPage();
        $cID = $c instanceof Page && !$c->isError() ? $c->getCollectionID() : 0;

        return $urlResolver->resolve(['/download_file', $this->getFileID(), $cID]);
    }