we are using gxt version 2.2.5. Unfortunately, I cannot get access to my code on this computer, so I will type in some psuedo-code to show what I'm trying to do. After the code executes, the tree is not updated.

Here's a code snippet:

Node oldNode = objTree.getStore().findModel("key", node.getKey());
if (oldNode != null) {
oldNode.setValue("newValue");
objTree.getStore().update(oldNode);
}