I have this code that worked for me:
title: "Layer tree",
width: 200,
id: "treelayer",
margins: '5 0 5 5',
xtype: "treepanel",
loader: new Ext.tree.TreeLoader({
applyLoader: false}),
root: {
nodeType: "async",
children: [
{
nodeType: "gx_baselayercontainer"
}, {
nodeType: "gx_overlaylayercontainer",
expanded: true,
loader: {
baseAttrs: {radioGroup: "foo"}
}
}
, {
nodeType: "gx_layer",
layer: "Forest",
isLeaf: false,
loader: {
param: "LAYERS"
}
}
]
HTH.
best regards
Sarah
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