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<?xml version="1.0"?>
<?xml-stylesheet href="chrome://global/skin/global.css" type="text/css"?>
<window xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul" onload="var tree = document.getElementById('tree'), treeitem = document.getElementById('treeitem'); tree.parentNode.insertBefore(treeitem, tree);">
<tree flex="1" id="tree">
<treecols>
<treecol id="name" label="Name" primary="true" flex="1"/>
</treecols>
<treechildren>
<treeitem id="treeitem">
<treerow>
<treecell label="Click the button below to crash"/>
</treerow>
</treeitem>
</treechildren>
</tree>
</window>