API call for listNewerInstalledPackages

Looking for a similar API call in Satellite 6 to the Satellite 5 call system.listNewerInstalledPackages.
I could write something to do this, but thought maybe I'm just not finding this in the api ref.

http://<your satellite 5/rhn/apidoc/handlers/SystemHandler.jsp#listNewerInstalledPackages

Anyone come across a similar API call in Satellite 6?