Flex Gumbo to set the background color of FxHScrollBar through baseColor style

<?xml version="1.0" encoding="utf-8"?>
<FxApplication name="FxHScrollBar_baseColor_test"
xmlns="/mxml/2009"
backgroundColor="white">
<ApplicationControlBar x="10" y="10">
<Form styleName="plain">
<FormItem label="baseColor:">
<ColorPicker
selectedColor="#CCCCCC" />
</FormItem>
</Form>
</ApplicationControlBar>
<VGroup horizontalCenter="0" verticalCenter="0">
<FxHScrollBar
baseColor="{}" />
</VGroup>
</FxApplication>