&vik_datasource_bfilter_dup_interface,
&vik_datasource_bfilter_polygon_interface,
&vik_datasource_bfilter_exclude_polygon_interface,
&vik_datasource_bfilter_dup_interface,
&vik_datasource_bfilter_polygon_interface,
&vik_datasource_bfilter_exclude_polygon_interface,