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) {
final path = Path()
..lineTo(0.0, size.height - 50.0)
..lineTo(size.width, size.height)
..lineTo(size.width, 0.0)
..close();
return path;
}