title: How to create an inner popup in JavaFX styled with FXML
body: <p>I have an FXML file that I'm using to allow user input when requested. Right now I just put it in a new stage and do <code>Stage.show()</code>. I would like to not have it appear in a new window and behave more like a <code>ContextMenu</code>.</p>
  
  <p>Looking at <code>ContextMenu</code> class it doesn't appear that I can set the content based off an FXML file. Is there a way to do this either with <code>ContextMenu</code> or <code>Popup</code> or some other class I am unaware of?</p>