title: Animate splitpane divider
body: <p>I have a horizontal split pane, and i would like to on button click, change divider position, so that i create sort of "slide" animation.</p>
  
  <p>divider would start at 0 (complete left) and on my click it would open till 0.2, when i click again, it would go back to 0;</p>
  
  <p>now i achived this, i just use </p>
  
  <pre><code>spane.setdividerPositions(0.2); 
  </code></pre>
  
  <p>and divider position changes, but i cant manage to do this slowly i would really like that slide feeling when changing divider position.</p>
  
  <p>Could anyone help me ? all examples i found on google, show some DoubleTransition, but that does not exist anymore in java 8, at least i dont have import for that.</p>