docs: def get_objective(self):
          """Gets the related objective.
  
          return: (osid.learning.Objective) - the related objective
          raise:  OperationFailed - unable to complete request
          *compliance: mandatory -- This method must be implemented.*
  
          """
          # Implemented from template for osid.learning.Activity.get_objective
          if not bool(self._my_map['objectiveId']):
              raise errors.IllegalState('objective empty')
          mgr = self._get_provider_manager('LEARNING')
          if not mgr.supports_objective_lookup():
              raise errors.OperationFailed('Learning does not support Objective lookup')
          lookup_session = mgr.get_objective_lookup_session(proxy=getattr(self, "_proxy", None))
          lookup_session.use_federated_objective_bank_view()
          return lookup_session.get_objective(self.get_objective_id())