toRegion method
Convert this region into a BaseRegion
Determine which type of BaseRegion using BaseRegion.when.
Implementation
BaseRegion toRegion() {
if (bounds != null) return RectangleRegion(bounds!);
if (center != null) return CircleRegion(center!, radius!);
if (line != null && radius != null) return LineRegion(line!, radius!);
return CustomPolygonRegion(line!);
}