Get Mura Site's Custom Image Sizes to use in a component or any other extended attribute

config.xml.cfm

<theme>

	<imagesizes>
		<imagesize name="carouselimage" width="939" height="479" />
	</imagesizes>

	<extensions>
		<extension type="Component" subType="Slider" hasBody="0">
	<attributeset name="Slider Options" container="Basic">
		<attribute 
			name="sImageSize"
			label="Image Size"
			hint="Enter the size of the images to be used"
			type="SelectBox"
			defaultValue=""
			required="false"
			validation=""
			regex=""
			message=""
			optionList="small^medium^large^[m]$.getCustomImageSizes()[/m]"
			optionLabelList="small^medium^large^[m]$.getCustomImageSizes()[/m]" />
	</attributeset>
</extension>

</extensions>

</theme>

mura-custom-image-sizes.cfm

<!--- Add this to your theme's eventHandler.cfc --->

<cfscript>
		// Get the site's custom image sizes
			public any function getCustomImageSizesQ(){
				return application.settingsManager.getSite($.event('siteid')).getCustomImageSizeQuery();
			}
			
		//return a caret dilemeted list to use in an extended attribute
			public any function getCustomImageSizes() {
				var rs = getCustomImageSizesQ();
				return ValueList(rs.name, '^');
			}
</cfscript>