title: Type for nodejs stream.Stream in typescript?
body: <p>I'm trying to write typings for a <a href="https://github.com/TooTallNate/node-stream-stack/blob/master/stream-stack.js" rel="nofollow noreferrer">node module</a> that includes a class that inherits from the nodejs <code>stream.Stream</code> class ... but I can't find that class in the typescript NodeJS module.  Where is it, and how should I handle the type of this <code>StreamStack</code> class, which seems to either be a <code>ReadableStream</code> or a <code>WritableStream</code> depending on context?</p>