mustella/tests/gumbo/layout3D/swfs/comps/ListButtonsNullRenderer.mxml

<?xml version="1.0"?>
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  this work for additional information regarding copyright ownership.
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<s:List xmlns:fx="http://ns.adobe.com/mxml/2009" xmlns:mx="library://ns.adobe.com/flex/mx" xmlns:s="library://ns.adobe.com/flex/spark"  dataProvider="{createIconsAC()}"
 itemRenderer="{null}" useVirtualLayout="true">
<fx:Script>
<![CDATA[

    import mx.collections.ArrayCollection;
    import spark.components.Button;
        public function createIconsAC():ArrayCollection
        {
                var acIcons:ArrayCollection = new ArrayCollection();
                for(var i:int=0; i<10;i++)
                {
                    var btn:Button=new Button;
                    btn.label="test "+ String(i);
                    acIcons.addItem(btn);
                 }
                 return acIcons;
        }
]]>
</fx:Script>

</s:List>