title: UI Popup Opacity Mask JavaFX
body: <p>Is it possible with <a href="https://openjfx.io/javadoc/17/javafx.graphics/javafx/stage/Popup.html" rel="nofollow noreferrer"><code>Popup</code></a> opacity mask top and bottom JavaFX? I have <code>TextField</code> autocomplete with <code>Popup</code>. So the idea is to put an opacity mask.</p>