title: JavaFX - Detect & highlight TableColumn being dragged onto
body: <p>What's the best way to discover which TableColumn (in a TableView) that a DragEvent occurred?  </p>
  
  <p>I'd like to be able to highlight (ex. change the background color to yellow, or show a yellow border around the column) a TableColumn as a dragged item is "hovering" over the it, to make it clear to the user which column they're dropping onto.  After the drag is finished of course I'll have to make sure the TableView's style is restored.  </p>
  
  <p>To be clear, the exact cell being dropped onto doesn't matter - just the column.</p>