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.
未来已来。新一轮科技革命与军事革命浪潮奔涌：人工智能重构指挥决策，无人作战颠覆传统模式，网络电磁空间开辟全新疆域……未来之战，是体系与体系的对抗，更是科技与创新的赛跑。
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Score this free Lego Star Wars Lightsaber at your nearest participating store on March 8.