class MyView: View() {
    override val root = VBox()

    init {
        with(root) {
            val items = mapOf(
                    "Windows" to 77.62,
                    "OS X" to 9.52,
                    "Other" to 3.06,
                    "Linux" to 1.55,
                    "Chrome OS" to 0.55
            )

            piechart("Desktop/Laptop OS Market Share") {
                data(items) //compile error
            }
        }
    }
}