received = ui.state(Event("waiting"))
count = ui.state(0)
function eventKind(): String { return received.value.kind }
label = TextBlock("waiting")
subscription = label.bind("text", eventKind)
withEvent = Button("传递 Event 给原生 set")
firstConnection = withEvent.on("click", received.set)
withoutEvent = Button("调用零参数原生 increment")
secondConnection = withoutEvent.on("click", count.increment)
page = Page()
page.title = "原生方法签名"
page.render(Column(24, 16, TextBlock("源码和原生回调共用参数契约"), label, ui.textOf(count, "value"), withEvent, withoutEvent))