title: Automatically resize stage if content is changed
body: <p>I have AnchorPane created with SceneBuilder and corresponding Scene and Stage. AnchorPane contains VBox. All sizes of AnchorPane are USE_COMPUTED_SIZE. Heght of VBox is changed programmicaly, but sizes of Scene and Stage do not change.</p>
  
  <p>How can I make them being autoadjusted to content size?</p>