@abc.abstractmethod<EOL><INDENT>def get_objectives_by_objective_banks(self, objective_bank_ids):<DEDENT>
return<EOL>
Gets the list of ``Objectives`` corresponding to a list of ``ObjectiveBanks``.

        :param objective_bank_ids: list of objective bank ``Ids``
        :type objective_bank_ids: ``osid.id.IdList``
        :return: list of objectives
        :rtype: ``osid.learning.ObjectiveList``
        :raise: ``NullArgument`` -- ``objective_bank_ids`` is ``null``
        :raise: ``OperationFailed`` -- unable to complete request
        :raise: ``PermissionDenied`` -- authorization failure

        *compliance: mandatory -- This method must be implemented.*