Replacement of overflow in Stack widget with clipbehaviour in Flutter v1.20 about convex_bottom_bar HOT 3 CLOSED

class Stack extends widget.Stack {
  /// Create stack instance
 	 Stack({
   	 widget.Key key,
    	AlignmentGeometry alignment = AlignmentDirectional.topStart,
    TextDirection textDirection,
    StackFit fit = StackFit.loose,
    //Overflow overflow = Overflow.clip,
    Clip clipBehavior = Clip.antiAlias,
    List<widget.Widget> children = const <widget.Widget>[],
  }) : super(
            key: key,
            alignment: alignment,
            textDirection: textDirection,
            fit: fit,
            clipBehavior: clipBehavior,
            // overflow: overflow,
            children: children);

  @override
  RenderStack createRenderObject(widget.BuildContext context) {
    return _RenderStack(
      alignment: alignment,
      textDirection: textDirection ?? widget.Directionality.of(context),
      fit: fit,
      clipBehavior: clipBehavior,
      // overflow: overflow,
    );
  }
}

/// Enable overflow hitTest
class _RenderStack extends RenderStack {
  _RenderStack({
    List<RenderBox> children,
    AlignmentGeometry alignment = AlignmentDirectional.topStart,
    TextDirection textDirection,
    StackFit fit = StackFit.loose,
    Clip clipBehavior = Clip.antiAlias,
  }) : super(
          children: children,
          alignment: alignment,
          textDirection: textDirection,
          fit: fit,
          clipBehavior: clipBehavior,
        );

  @override
  bool hitTest(BoxHitTestResult result, {Offset position}) {
    if (clipBehavior == Clip.antiAliasWithSaveLayer ||
        size.contains(position)) {
      if (hitTestChildren(result, position: position) ||
          hitTestSelf(position)) {
        result.add(BoxHitTestEntry(this, position));
        return true;
      }
    }
    return false;
  }
}

```

I might wrong . Just my 2cent. I hope this might help you.