roundRect
inline fun Container.roundRect( size: Size, radius: RectCorners, fill: Paint = Colors.WHITE, stroke: Paint = Colors.WHITE, strokeThickness: Double = 0.0, autoScaling: Boolean = true, callback: RoundRect.() -> Unit = {}): RoundRect
Creates a new RoundRect of size widthxheight and color and allows you to configure it via callback. Once created, it is added to this receiver Container.