@abc.abstractmethod<EOL><INDENT>def get_resources_at_spatial_unit_by_genus_type(self, spatial_unit, resource_genus_type):<DEDENT>
return<EOL>
Gets the current resource within the given spatial unit for a given resource genus type.

        :param spatial_unit: a spatial unit
        :type spatial_unit: ``osid.mapping.SpatialUnit``
        :param resource_genus_type: a resource genus type
        :type resource_genus_type: ``osid.type.Type``
        :return: the resources at the location
        :rtype: ``osid.mapping.ResourceLocationList``
        :raise: ``NullArgument`` -- ``spatial_unit`` or ``resource_genus_type`` is ``null``
        :raise: ``OperationFailed`` -- unable to complete request
        :raise: ``PermissionDenied`` -- authorization failure

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