<zk>
	<zscript><![CDATA[
	
	DefaultTreeNode r = new DefaultTreeNode("root",new ArrayList());
	DefaultTreeNode n1 = new DefaultTreeNode("Node 1",new ArrayList());
	DefaultTreeNode n2 = new DefaultTreeNode("Node 2",new ArrayList());
	DefaultTreeNode n3 = new DefaultTreeNode("Node 3",new ArrayList());
	DefaultTreeNode n4 = new DefaultTreeNode("Node 4");
	
	r.add(n1);
	n1.add(n2);
	n2.add(n3);
	n3.add(n4);
	           
	DefaultTreeModel model = new DefaultTreeModel(r);
	model.addOpenObject(n1);
	model.addOpenObject(n2);
	model.addOpenObject(n3);
	
]]></zscript>
	<label multiline="true">
		1.click on set Node2 Data, the node 2 label should change to New Node 2, and still has child Node3
		2.if the bug is not fixed, Node 2 will become a Leaf Node. 
	</label>
	<button label="set Node2 Data" onClick='n2.setData("New Node 2")'/>
	<tree model="${model}">
		<treecols visible="false">
			<treecol label="Unit"></treecol>
		</treecols>
		<template name="model">
			<treeitem>
				<treerow>
					<treecell label="${each.data}"/>
				</treerow>
			</treeitem>
		</template>
	</tree>
</zk>