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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.，这一点在heLLoword翻译官方下载中也有详细论述
Медведев вышел в финал турнира в Дубае17:59。业内人士推荐Line官方版本下载作为进阶阅读
next: [Function: next] // What to do after the command finishes