[Users] setIconCls Error, is Not a Function

[IT Intern]

Hello GeoExt List,

I have a tree panel with some nodes/containers etc.  I want to be able to
use setIconCls to change their iconCls *after* the tree has been created.
Unfortunately when I try to use this method I get an error in firebug tell
me that setIconCls is not a function...what am I doing wrong here?

layerRoot = new Ext.tree.TreeNode({
                text: "All Layers",
                expanded: true
            });

tibetContainer = new Ext.tree.TreeNode({
                text: "Tibetan Labels",
                expanded: true,
                id: 'tibet'
            });

var layerTree = new Ext.tree.TreePanel({
                overflow: 'visible',     // For the Combo popup
                region: "west",
                title: "Map Layers",
                root: layerRoot,
                loader: new Ext.tree.TreeLoader({applyLoader: false}),
                enableDD: true,
                collapsible: true,
                width: 300,
                autoScroll: true,
                expanded: false
            });

layerRoot.getOwnerTree().getNodeById(tibetContainer.id).setIconCls('myClass');
//fails

Thanks for your time,

elshae
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