Re: [streams] explicity operate on underlying source and sink instead of public methods (#321)

> I guess I would recommend creating "Write to sink" algorithms that are associated with the stream.

That sounds like `underlyingSink.write` ;). Which is exactly what WriteToWritableStream would call, after ensuring that previous writes had finished, etc.

---
Reply to this email directly or view it on GitHub:
https://github.com/whatwg/streams/issues/321#issuecomment-91052150