@abc.abstractmethod<EOL><INDENT>def get_parents(self, id_):<DEDENT>
return<EOL>
Gets the parents of the given ``id``.

        :param id: the ``Id`` to query
        :type id: ``osid.id.Id``
        :return: the parents of the ``id``
        :rtype: ``osid.id.IdList``
        :raise: ``NotFound`` -- ``id`` is not found
        :raise: ``NullArgument`` -- ``id`` is ``null``
        :raise: ``OperationFailed`` -- unable to complete request
        :raise: ``PermissionDenied`` -- authorization failure

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