@abc.abstractmethod<EOL><INDENT>def get_locations_by_parent_genus_type(self, location_genus_type):<DEDENT>
return<EOL>
Gets a ``LocationList`` corresponding to the given location genus ``Type`` and include any additional locations with genus types derived from the specified ``Type``.

        In plenary mode, the returned list contains all known locations
        or an error results. Otherwise, the returned list may contain
        only those locations that are accessible through this session.

        :param location_genus_type: a location genus type
        :type location_genus_type: ``osid.type.Type``
        :return: the returned ``Location`` list
        :rtype: ``osid.mapping.LocationList``
        :raise: ``NullArgument`` -- ``location_genus_type`` is ``null``
        :raise: ``OperationFailed`` -- unable to complete request
        :raise: ``PermissionDenied`` -- authorization failure

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