Setting icons for specific nodes in a Flex Tree control

<?xml version="1.0" encoding="utf-8"?>
<!-- http://blog.flexexamples.com/2007/11/29/setting-icons-for-specific-nodes-in-a-flex-tree-control/ -->
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"
        layout="horizontal"
        verticalAlign="middle"
        backgroundColor="white"
        creationComplete="init();">
 
    <mx:Script>
        <![CDATA[
            [Embed("assets/folder_table.png")]
            private var FolderTableIcon:Class;
 
            [Embed("assets/folder_user.png")]
            private var FolderUserIcon:Class;
 
            [Embed("assets/folder_wrench.png")]
            private var FolderWrenchIcon:Class;
 
            private function init():void {
                var nodeOne:XML = xmlListColl.getItemAt(0) as XML;
                tree.setItemIcon(nodeOne, FolderTableIcon, FolderTableIcon);
 
                var nodeTwo:XML = xmlListColl.getItemAt(1) as XML;
                tree.setItemIcon(nodeTwo, FolderUserIcon, FolderUserIcon);
 
                var nodeThree:XML = xmlListColl.getItemAt(2) as XML;
                tree.setItemIcon(nodeThree, FolderWrenchIcon, FolderWrenchIcon);
            }
        ]]>
    </mx:Script>
 
    <mx:XMLListCollection id="xmlListColl">
        <mx:source>
            <mx:XMLList>
                <node label="One">
                    <node label="One.1">
                        <node label="One.1.1">
                            <node label="One.1.1.1">
                                <node label="One.1.1.1.1" />
                            </node>
                        </node>
                    </node>
                    <node label="One.2" />
                    <node label="One.3" />
                </node>
                <node label="Two">
                    <node label="Two.1" />
                    <node label="Two.2" />
                    <node label="Two.3" />
                </node>
                <node label="Three" />
            </mx:XMLList>
        </mx:source>
    </mx:XMLListCollection>
 
    <mx:Tree id="tree"
            dataProvider="{xmlListColl}"
            labelField="@label"
            width="250"
            rowCount="6"
            showScrollTips="true" />
 
</mx:Application>