modal

modal() {
    var restoreFocus: Boolean
    var setInitialFocus: Boolean
    // inherited by `OpenClose`
    val openState: DatabindingProperty<Boolean>
    val opened: Flow<Boolean>
    val close: SimpleHandler<Unit>
    val open: SimpleHandler<Unit>
    val toggle: SimpleHandler<Unit>

    modalPanel() {
        modalOverlay() { }
        modalTitle() { }
        modalDescription() { } // use multiple times

        // setInitialFocus() within one tag is possible
    }
}