if (it.size > 0) {
                        it.getJsonObject(0).keys.forEachIndexed { index, keyName ->
                            val column = TableColumn<ObservableList<JsonValue>, String>(keyName)
                            column.setCellValueFactory {
                                ReadOnlyObjectWrapper<String>(it.value[index].toString()) }
                            resultTable.columns.add(column)
                        }
                        
                    }

class MainView : View() {
    override val root = AnchorPane()
    private lateinit var ball: Circle
    init {
        with(root) {
            ball = Circle(10.0, Paint.valueOf("#000"))
            root += ball
            ball.apply {
                layoutX = 100.0
                layoutY = 100.0
            }
            timeline {
                keyframe(1.seconds) {
                    updateBall()
                }
                cycleCount = Timeline.INDEFINITE
            }
        }
    }

    private fun updateBall() {
        println("update now ")
    }
}

AnimationTimer

object : AnimationTimer() {
    override fun handle(now: Long) {
        if (dirty) {
            dirty = false
            redraw()
        }
    }
}.start()

eachFrame {
    // TODO: Implement
}

fun eachFrame(op: (Long) -> Unit) = object : AnimationTimer {
    override fun handle(now: Long) = op(now)
}.also(AnimationTimer::start)

AnimationTimer

FrameTick

FrameCallback

TileGui