ExtJS 4.0 Find data in model and treepanel
===

With the following Json I populate a treepanel:

    [{"text":"Item 1}", "expanded":true, "cls":"folder", "children":
        [{"text":"Item 1.1", "leaf":true, "foo", "bar"},
        ...
    ...

When the user selects Item 1.1 in the tree I'm able to find the selected Item:

    onTreepanelSelectionChange: function(tablepanel, selections, options) {
        var selItem = selections[0].data.text;


So I have access to properties like **text**, **expanded**, ... But I can't find a way to access the value of **foo**. I think my problem is caused by the fact that I find the selected item via the treepanel and that the value of **foo** is only available in the store.
