anchor.diff:    /// change between successive calls.
     bool _checkLoaded() => serviceManager.hasConnection;
   
  -  OverlayEntry currentDisconnectedOverlay;
  +  OverlayEntry? currentDisconnectedOverlay;
   
     @override
     void initState() {
  
positive.code:         ),
        ),
      );
      return currentDisconnectedOverlay;
    }
  
    @override
  
negative.code: /// here.
  class Initializer extends StatefulWidget {
    const Initializer({
      Key? key,
      required this.url,
      required this.builder,
      this.allowConnectionScreenOnDisconnect = true,
    }) : super(key: key);
  
    /// The builder for the widget's children.
    ///
  