Where is the spatial (geo based) search functionality in RHDG 8.1?

Issue

• When migrating from RHDG 7 to RHDG 8.1+ the spatial search can not be found
• The following code can not be migrated to RHDG 8.1+, what is the related search using Ickle?

Query query = Search.getSearchManager(geoCache)
              .buildQueryBuilderForClass(Location.class)
              .get().spatial()
              .within(param.getPerimeter(), Unit.KM)
              .ofLatitude(param.getPoint().getY())
              .andLongitude(param.getPoint().getX())
              .createQuery();
CacheQuery cacheQuery = Search.getSearchManager(geoCache).getQuery(query,Location.class);