getClip method
Returns a description of the clip given that the render object being clipped is of the given size.
Implementation
@override
Path getClip(Size size) {
var path = Path();
path.lineTo(0, 0);
path.lineTo(0, 40);
path.quadraticBezierTo(size.width / 4, 0, size.width / 2, 0);
path.quadraticBezierTo(size.width - size.width / 4, 0, size.width, 40);
path.lineTo(size.width, size.height);
path.lineTo(0, size.height);
return path;
}