title: Magnolia, JCR, sort node order by customized property value
body: <p>For example, i have a node ref 29949, it has property like this:
  <a href="https://i.stack.imgur.com/TNzXa.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/TNzXa.png" alt="enter image description here"></a></p>
  
  <p>so it's positionIndex is 1,  this is a customized property.
  my current nodes is totally unordered, like this:</p>
  
  <p><a href="https://i.stack.imgur.com/Zt6fe.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/Zt6fe.png" alt="enter image description here"></a></p>
  
  <p>I wish to compare and sort node into a ascending order by this property-positionIndex,  so this node 29949 will stand under 44440, as 44440 has value positionIndex 0.  Anyone got any idea how to do that? any code example would be nice.<br>
  Cheers</p>