The Writer is not a concrete class. Any object that implements write(), end(), and abort() can be a writer making it easy to adapt existing APIs or create specialized implementations without subclassing. There's no complex UnderlyingSink protocol with start(), write(), close(), and abort() callbacks that must coordinate through a controller whose lifecycle and state are independent of the WritableStream it is bound to.
return Command(cmdValidatePromo, next);，这一点在旺商聊官方下载中也有详细论述
，更多细节参见爱思助手下载最新版本
Израиль нанес удар по Ирану09:28
一位科技产业观察人士称，现在产能分配优先级是：AI服务器数据中心……手机、电脑排在最后。。业内人士推荐搜狗输入法下载作为进阶阅读