anchor.diff:            duration,
             backgroundColor: backgroundColor,
             textStyle: textStyle,
  -          onComplete: () {
  -            entry!.remove();
  -          },
  +          onComplete: close,
           ),
         ),
       );
  
positive.code:           .subtitle1;
  
    OverlayEntry? entry;
    entry = OverlayEntry(builder: (context) {
      return Align(
        alignment: Alignment.bottomCenter,
  
negative.code:   Timer.run(() {
      Overlay.of(context)!.insert(entry!);
    });
  
    return close;
  }
  