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<?xml version="1.0"?>
<?xml-stylesheet href="chrome://global/skin/global.css"?>
<?xml-stylesheet href="chrome://devtools/skin/variables.css"?>
<?xml-stylesheet href="chrome://devtools/skin/tooltips.css"?>
class="theme-light" title="Tooltip hover test">
<vbox id="container" flex="1">
<hbox id="box1" flex="1"><label>test1</label></hbox>
<hbox id="box2" flex="1"><label>test2</label></hbox>
<hbox id="box3" flex="1"><label>test3</label></hbox>
<hbox id="box4" flex="1"><label>test4</label></hbox>
</vbox>
</window>