Variables in Widget Dynamic Configuration?

I'm trying to implement a  core_v2_forumLookup Property Template  in a custom widget but I would like the available forums in the lookup to be scoped only to the group where the widget is placed. I saw the property parentGroupId and when I hard code that to my testing group id it works as expected in limiting the scope. However trying to get it in context using variants of $core_v2_group.Current.Id doesn't seem to be able to retrieve it.


  1. Are variables allowed in Dynamic Configuration templates?
  2. If yes, is there a better method to get the current group id  into parentGroupId than $core_v2_group.Current.Id?