anchor.diff:  /// ```
   /// {@end-tool}
   ///
  +/// {@template flutter.painting.boxDecoration.clip}
  +/// The [shape] or the [borderRadius] won't clip the children of the
  +/// decorated [Container]. If the clip is required, insert a clip widget
  +/// (e.g., [ClipRect], [ClipRRect], [ClipPath]) as the child of the [Container].
  +/// Be aware that clipping may be costly in terms of performance.
  +/// {@endtemplate}
  +///
   /// See also:
   ///
   ///  * [DecoratedBox] and [Container], widgets that can be configured with
  
positive.code:   ///
    /// Applies only to boxes with rectangular shapes; ignored if [shape] is not
    /// [BoxShape.rectangle].
    final BorderRadiusGeometry borderRadius;
  
    /// A list of shadows cast by this box behind the box.
  
negative.code:   /// different [ShapeBorder]s; in particular, [CircleBorder] instead of
    /// [BoxShape.circle] and [RoundedRectangleBorder] instead of
    /// [BoxShape.rectangle].
    ///
    /// {@macro flutter.painting.boxDecoration.clip}
    final BoxShape shape;
  
    @override
  