def get_activity_smart_objective_bank_session(self, objective_bank_id=None):
raise Unimplemented()<EOL>
Gets the OsidSession to manage dynamic objective banks of
        activities.

        arg:    objectiveBankId (osid.id.Id): the Id of the
                ObjectiveBank
        return: (osid.learning.ActivitySmartObjectiveBankSession) - an
                ActivitySmartObjectiveBankSession
        raise:  NotFound - no objective bank found by the given Id
        raise:  NullArgument - objectiveBankId is null
        raise:  OperationFailed - unable to complete request
        raise:  Unimplemented - supports_activity_smart_objective_bank()
                is false
        compliance: optional - This method must be implemented if
                    supports_activity_smart_objective_bank() is true.