unstable class MutableRect {
  stable var left: Float
  stable var top: Float
  stable var right: Float
  stable var bottom: Float
  <runtime stability> = Unstable
}
stable class Rect {
  stable val left: Float
  stable val top: Float
  stable val right: Float
  stable val bottom: Float
}
stable class RoundRect {
  stable val left: Float
  stable val top: Float
  stable val right: Float
  stable val bottom: Float
  stable val topLeftCornerRadius: CornerRadius
  stable val topRightCornerRadius: CornerRadius
  stable val bottomRightCornerRadius: CornerRadius
  stable val bottomLeftCornerRadius: CornerRadius
  stable var _scaledRadiiRect: RoundRect?
}