code: def get_activity_admin_session(self):
          
          if not self.supports_activity_admin():
              raise Unimplemented()
          try:
              from . import sessions
          except ImportError:
              raise OperationFailed()
          try:
              session = sessions.ActivityAdminSession(runtime=self._runtime)
          except AttributeError:
              raise OperationFailed()
          return session
docs: Gets the OsidSession associated with the activity administration
          service.
  
          return: (osid.learning.ActivityAdminSession) - a
                  ActivityAdminSession
          raise:  OperationFailed - unable to complete request
          raise:  Unimplemented - supports_activity_admin() is false
          compliance: optional - This method must be implemented if
                      supports_activity_admin() is true.