[ticket_fold] FlatButton onTap inside ticket_fold doesn't trigger about flutter_vignettes HOT 6 CLOSED

class MyHomePage extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: Text("GestureDetector Test")),
      body: Column(
        children: <Widget>[
          GestureDetector(
            onTap: () => print("gestureDetector onTap"),
            child: Column(
              crossAxisAlignment: CrossAxisAlignment.stretch,
              children: <Widget>[
                Container(
                  color: Colors.red, 
                  height: 200, 
                  child: Text("Gesture"),
                ),
                FlatButton(
                  child: Text("button"), 
                  onPressed: () => print("button onPressed"),
                )
              ],
            ),
          )
        ],
      ),
    );
  }
}

Gesture arena 48   ❙ ★ Opening new gesture arena.
// GestureDetector's onTap 
Gesture arena 48   ❙ Adding: TapGestureRecognizer#6cdd6(debugOwner: GestureDetector, state: ready, button: 1)
// ListView scroll
Gesture arena 48   ❙ Adding: VerticalDragGestureRecognizer#675e5(start behavior: start)
Gesture arena 48   ❙ Closing with 2 members.
Gesture arena 48   ❙ Rejecting: VerticalDragGestureRecognizer#675e5(start behavior: start)
Gesture arena 48   ❙ Sweeping with 1 member.
Gesture arena 48   ❙ Winner: TapGestureRecognizer#6cdd6(debugOwner: GestureDetector, state: ready, finalPosition: Offset(129.4, 493.4), finalLocalPosition: Offset(129.4, 380.3), button: 1, sent tap down)