function setExitTimeout(time){
    let timeoutExit_ = engines.execScript(util.format("%s 的定时关闭", files.getName(engines.myEngine().source)), 
    ([
        "events.on(\"set_e\", (engine, time) => {",
        "    console.log(engine, time);",
        "    setTimeout(()=>{",
        "        engine.forceStop();",
        "    }, time);",
        "});",
        "setTimeout(()=>{}, 5000);"
    ]).join("\n"));
    while(timeoutExit_.getEngine() === null){}
    setTimeout(()=>{timeoutExit_.getEngine().emit("set_e", engines.myEngine(), time)}, 250);
    let engine = timeoutExit_.getEngine();
    class timeoutExit {
        constructor (engine) {
            this.engine = engine;
        }
        clear () {
            this.engine.forceStop();
        }
    }
    return new timeoutExit(engine);
}
setExitTimeout(6000);
// setTimeout(()=>{}, 10000);

22:56:46.858/E: identifier is a reserved word: class (/storage/emulated/0/auto.js/脚本/自动启动脚本/每n分钟执行一次/1/1.js#15)
identifier is a reserved word: class

是为什么啊