ClipRRectLayer constructor

ClipRRectLayer({@required RRect clipRRect, Clip clipBehavior: Clip.antiAlias })

Creates a layer with a rounded-rectangular clip.

The clipRRect property must be non-null before the compositing phase of the pipeline.

Implementation 

ClipRRectLayer({ @required RRect clipRRect, Clip clipBehavior = Clip.antiAlias }) :
      _clipRRect = clipRRect, _clipBehavior = clipBehavior,
      assert(clipBehavior != null), assert(clipBehavior != Clip.none);