class NavTestView : View() {
    override val root = vbox {
        button("Goto View1") {
            setOnAction { Navigation.goto(View1::class) }
        }
        button("Goto View2") {
            setOnAction { Navigation.goto(View2::class) }
        }
    }
}

class View1 : View() {
    override val root = vbox {
        label("View1")
    }
}

class View2 : View() {
    override val root = vbox {
        label("View2")
    }
}

object Navigation {
    fun goto(type: KClass<out View>) {
        find(type).openModal()
    }
}

class NavTestApp : App(NavTestView::class)