title: How do I know which node is focused in JavaFX?
body: <p>I have a lot of <code>TextArea</code> nodes in a <code>Scene</code>. </p>
  
  <p>Is it possible for me to figure out which <code>TextArea</code> is selected (has the caret in it)?<br>
  I would like to be able to select the node and set it to a <code>Node</code> variable.</p>