[flexcoders] How to do a function/method in a Tree for the label

[timgerr]

Hello all, I am having some troubles with the tree control and an array 
collection.  I have this tree and the data provider is pointing to an array 
collection.  This is working great, I now have to create a label function for 
the labelField.  So this is what I did:

public function TreeNodeLabel(obj:Object):String
        {
                return obj.name;
        }

Here is my MXML code:
<mx:Tree x="510" y="271" dataProvider="{this._ac}" 
labelField="{this.TreeNodeLabel()}"></mx:Tree>

What am I supposed to use as the argument in the mxml code for the 
this.TreeNodeLabel()  ?????


Thanks,
timgerr