[flexcoders] Is it possible to define a component's skin within the component itself using something like fx:component?

[Baz]

Is it possible to define a component's skin within the component itself
along the lines of:

<s:Button xmlns:fx="http://ns.adobe.com/mxml/2009";>
 <s:skinClass>
 <fx:Component>
 <s:SparkSkin xmlns:s="library://ns.adobe.com/flex/spark">
 ...
 </s:SparkSkin>
 </fx:Component>
 </s:skinClass>
</s:Button>