gistfile1.txt

  Future<void> _followLink(BuildContext context) async {
    if (!link.uri!.hasScheme || !kisWeb) {
      // A uri that doesn't have a scheme is an internal route name. In this
      // case, we push it via Flutter's navigation system instead of letting the
      // browser handle it.
      final String routeName = link.uri.toString();
      await pushRouteNameToFramework(context, routeName);
      return;
    }

    // At this point, we know that the link is external. So we use the `launch`
    // API to open the link.
    final String urlString = link.uri.toString();
    if (await canLaunch(urlString)) {
      await launch(
        urlString,
        forceSafariVC: _useWebView,
        forceWebView: _useWebView,
      );
    } else {
      FlutterError.reportError(FlutterErrorDetails(
        exception: 'Could not launch link $urlString',
        stack: StackTrace.current,
        library: 'url_launcher',
        context: ErrorDescription('during launching a link'),
      ));
    }
  }