title: Is Scene.getWindow() Always a Stage?
body: <p>Coming from <a href="https://stackoverflow.com/questions/11994366/how-to-reference-primarystage">How to reference primaryStage</a> I learned that I can get the <code>Stage</code> of a particular control by using <code>control.getScene.getWindow()</code>, but this returns a <code>Window</code> instead of a <code>Stage</code>. I know that <code>Stage</code> is a type of <code>Window</code>, but my question is will the returned object always be a <code>Stage</code>, or will it be something else in some cases? Also, will I know that it will be something else?</p>