Getting a button's icon size

I often want to set the size of an button based on the size of its icon but access to the icon can only be done through protected methods, so I wrote this simple component to expose the icons dimensions.

UtilButton.mxml:

<?xml version="1.0" encoding="utf-8"?>
<mx:Button xmlns:mx="http://www.adobe.com/2006/mxml">
    <mx:Script>
       <![CDATA[
        import mx.core.mx_internal;
        use namespace mx_internal;

        public function get iconWidth():int {
            return getCurrentIcon().width;
        }

        public function get iconHeight():int {
            return getCurrentIcon().height;
        }
       ]]>
    </mx:Script>
</mx:Button>

Then the button's size can be set like this:

 
    <comps:UtilButton id="closeButton" 
        icon="@Embed('assets/CloseX.png')"
        width="{closeButton.iconWidth + 6}"
        height="{closeButton.iconHeight + 6}"/>