ClipRRect({Key key, BorderRadius borderRadius, CustomClipper<RRect> clipper, Widget child })

Creates a rounded-rectangular clip.

The borderRadius defaults to BorderRadius.zero, i.e. a rectangle with right-angled corners.

If clipper is non-null, then borderRadius is ignored.

Source 

ClipRRect({
  Key key,
  this.borderRadius,
  this.clipper,
  Widget child,
}) : super(key: key, child: child) {
  assert(borderRadius != null || clipper != null);
}