<TBD>
Use Case: Show custom field based on the site or site code selected in the CP site dropdown.
Show field when the site 'TPC' is added in the CP sites
<showWhen><![CDATA[$extendedObj.cpSites.siteName= "TPC"]]></showWhen>
The field display can also be configured based on the site code like below
<showWhen><![CDATA[$extendedObj.cpSites.code= "TPC-code"]]></showWhen>