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.
ВСУ запустили «Фламинго» вглубь России. В Москве заявили, что это британские ракеты с украинскими шильдиками16:45，这一点在搜狗输入法下载中也有详细论述
，详情可参考旺商聊官方下载
Why are resident doctors striking and how much are they paid?。safew官方版本下载对此有专业解读
'required': ['color'],