And talking about bodid vs idBod vs id, did you also plan to change the identifier key in the [ol layer objects](https://github.com/geoadmin/mf-geoadmin3/blob/master/src/components/map/MapService.js#L113)? I think we should still use `id` there. In this way we have a systematic way to retrieve a layer from the map by its id, whether the layer is a bod layer, an external layer, or a utility layer.