@abc.abstractmethod<EOL><INDENT>def get_locations_overlapping_spatial_unit(self, spatial_unit):<DEDENT>
return<EOL>
Gets the locations that are included inside or touch the given spatial unit.

        In plenary mode, all locations are returned or an error results.

        :param spatial_unit: a spatial unit
        :type spatial_unit: ``osid.mapping.SpatialUnit``
        :return: the returned ``Locations``
        :rtype: ``osid.mapping.LocationList``
        :raise: ``NullArgument`` -- ``spatial_unit`` is ``null``
        :raise: ``OperationFailed`` -- unable to complete request
        :raise: ``PermissionDenied`` -- authorization failure
        :raise: ``Unsupported`` -- spatial unit not supported

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