class CooperativeWork {
    steps: Object
    function run(self: CooperativeWork): Unit {
        self.steps.increment()
        self.steps.increment()
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    }
}
left = CooperativeWork(ui.state(0))
right = CooperativeWork(ui.state(0))
leftTask = ui.spawn(left,"work",left.run)
rightTask = ui.spawn(right,"work",right.run)
leftStatus = TextBlock("")
rightStatus = TextBlock("")
leftStatus.bind("text",leftTask.status)
rightStatus.bind("text",rightTask.status)
page = Page()
page.title = "独立暂停调用"
page.render(Column(24,16,TextBlock("两个任务分别保存执行帧；在 REPL 查看 left.steps.value / right.steps.value",2),leftStatus,rightStatus))