docs: def get_courses(self):
          """Gets any courses associated with this activity.
  
          return: (osid.course.CourseList) - list of courses
          raise:  IllegalState - ``is_course_based_activity()`` is
                  ``false``
          raise:  OperationFailed - unable to complete request
          *compliance: mandatory -- This method must be implemented.*
  
          """
          # Implemented from template for osid.learning.Activity.get_assets_template
          if not bool(self._my_map['courseIds']):
              raise errors.IllegalState('no courseIds')
          mgr = self._get_provider_manager('COURSE')
          if not mgr.supports_course_lookup():
              raise errors.OperationFailed('Course does not support Course lookup')
  
          # What about the Proxy?
          lookup_session = mgr.get_course_lookup_session(proxy=getattr(self, "_proxy", None))
          lookup_session.use_federated_no_catalog_view()
          return lookup_session.get_courses_by_ids(self.get_course_ids())