SimpleFeature feature = (SimpleFeature) f.next();
                SimpleFeatureType schema = feature.getFeatureType();
                // get the next fid
                LinkedList fids = (LinkedList) schema2fids.get(schema.getTypeName());
                String fid = ((FeatureId) fids.removeFirst()).getID();
                insertedFeature = WfsFactory.eINSTANCE.createInsertedFeatureType();
                insertedFeature.setHandle(insert.getHandle());
                insertedFeature.getFeatureId().add(filterFactory.featureId(fid));