getApproximateClipRect method

Rect getApproximateClipRect (Size size)

Returns an approximation of the clip returned by getClip, as an axis-aligned Rect. This is used by the semantics layer to determine whether widgets should be excluded.

By default, this returns a rectangle that is the same size as the RenderObject. If getClip returns a shape that is roughly the same size as the RenderObject (e.g. it's a rounded rectangle with very small arcs in the corners), then this may be adequate.

Implementation 

Rect getApproximateClipRect(Size size) => Offset.zero & size;