typedef PersistentHeapHashMap<Member<Geolocation>, int> GeolocationIdMap;
typedef PersistentHeapHashMap<int, Member<Geolocation> > IdGeolocationMap;
typedef PersistentHeapHashMap<Member<Geolocation>, int> GeolocationIdMap;
typedef PersistentHeapHashMap<int, Member<Geolocation> > IdGeolocationMap;