anchor.diff:  class _CardContainerState extends State<WebViewContainer> {
     WebViewController _webViewController;
     double _contentHeight = cardContentMinHeight;
  -  String webCardUrl;
     bool active;
     Function hide;
   
  
positive.code:           child: WebView(
              opaque: false,
              javascriptMode: JavascriptMode.unrestricted,
              initialUrl: webCardUrl,
              onWebViewCreated: (controller) {
                _webViewController = controller;
              },
              javascriptChannels: <JavascriptChannel>[
                _linksChannel(context),
                _heightChannel(context),
                _refreshTokenChannel(context),
              ].toSet(),
            ),
          ),
  
negative.code:       },
      );
    }
  }
  