reimplement wrapped prefetch_related

src/c3nav/editor/api.py

@@ -88,6 +88,9 @@ class EditorViewSet(ViewSet):
                 self._get_level_geometries(level),
                 *(self._get_level_geometries(s) for s in levels_on_top)
             )
+            results = tuple(results)
+            for result in results:
+                print(type(result).__name__)
 
             return Response([obj.to_geojson() for obj in results])
         elif space is not None: