"Of course, there were no women astronauts back then. But I just thought, I'll be a lady astronaut."
Forsiden Breaking Free
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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.，更多细节参见safew官方下载
Data processing agreement
Drag to draw a query rectangle and watch which nodes get visited (blue) vs. pruned (red):