flex - how to access all item renderer of MX: Tree in? -

In my renderer it has a canvas, I add some title-window, every time I added my tree Title-windows are visible, I want to use every n in every tree in the tree and add all the windows to the already deletion. Can anyone tell me how to use all the items renderer in AS3?

For example, using id_tree " DATAPRID , Then using

  for each; root TAP: XML root tag difendend ()) {id_tree .itemToItemRenderer (tmp);}