title: add Dynamic children to an array or arraycollection
body: <p>I'm a bit new to flex and cannot get my head around this problem. can someone help. thanks in advance.</p>
  
  <p>I have a  string list path.<br>
  path 1 -  "one/two/three"<br>
                             path 2 - "one/two/four"<br>
                             path 3 - "five/six"</p>
  
  <p>i need an advanced datagrid to show a tree structure like so<br>
  one/<br>
  ...two/<br>
  ........three/<br>
  ............four<br>
  five/<br>
  .......six<br>
  but i want to achieve this dynamicall with arrays, objects, or arraycollection (as applicable)<br>
  I need to loop through each string path using string methods which isnt a problem but how do i create "DYNAMIC" (depth) children? please help as i'm about to pull  my hair out. </p>