Flex tree space default event listener -

i have noticed when select tree node if space clicked selected node gets opened... how remove event?

it doesn't there's way prevent event , if there 1 i'm not sure it's wise since tree's keydownhandler little bit more opening node.

i solved creating custom tree. sadly had copy few lines of code tree's keydownhandler.

public class mytree extends tree {     override protected function keydownhandler(event:keyboardevent):void     {         if (event.keycode == keyboard.space)         {             // code copied tree's keydownhandler              // if user has moved caret cursor selected item             // move cursor selected item             if (caretindex != selectedindex)             {                 // erase caret                 var renderer:ilistitemrenderer = indextoitemrenderer(caretindex);                  if (renderer)                     drawitem(renderer);                 caretindex = selectedindex;             }              event.stopimmediatepropagation();         }         else         {             super.keydownhandler(event);         }     } }