anchor.diff:            child: WebView(
               opaque: false,
               javascriptMode: JavascriptMode.unrestricted,
  -            initialUrl: webCardUrl,
  +            initialUrl: widget.initialUrl,
               onWebViewCreated: (controller) {
                 _webViewController = controller;
               },
               javascriptChannels: <JavascriptChannel>[
                 _linksChannel(context),
                 _heightChannel(context),
  -              _refreshTokenChannel(context),
               ].toSet(),
             ),
           ),
  
positive.code:     super.initState();
      hide = () => Provider.of<CardsDataProvider>(context, listen: false)
          .toggleCard(widget.cardId);
      webCardUrl = widget.initialUrl;
    }
  
    @override
  
negative.code: class _CardContainerState extends State<WebViewContainer> {
    WebViewController _webViewController;
    double _contentHeight = cardContentMinHeight;
    bool active;
    Function hide;
  
  