clipRRect method
裁剪圆角
Implementation
Widget clipRRect({
  Key? key,
  double? all,
  double? topLeft,
  double? topRight,
  double? bottomLeft,
  double? bottomRight,
  CustomClipper<RRect>? clipper,
  Clip clipBehavior = Clip.antiAlias,
}) =>
    ClipRRect(
      key: key,
      child: this,
      clipper: clipper,
      clipBehavior: clipBehavior,
      borderRadius: BorderRadius.only(
        topLeft: Radius.circular(topLeft ?? all ?? 0.0),
        topRight: Radius.circular(topRight ?? all ?? 0.0),
        bottomLeft: Radius.circular(bottomLeft ?? all ?? 0.0),
        bottomRight: Radius.circular(bottomRight ?? all ?? 0.0),
      ),
    );