Authorization in Webdynpro applications?

Hi,

I read about How to manage authorization in Webdynpros. It talks about the hasPermission method, which is linked to actions, which is further linked to Roles.

Is there any direct method which can be used to access the Role of the current user which can later be used to restrict the Visibility of certain UI Elements in the Webdynpro application.

Can the method "isMemberOfRole" be of any significant use?

Regards

Meesum