anchor.diff:  private ReadOnlyKeyValueStore<Integer, Aggregation> getWeatherStationStore() {
       while (true) {
           try {
  -            return streams.store(WEATHER_STATIONS_STORE, QueryableStoreTypes.keyValueStore());
  +            return streams.store(WEATHER_STATIONS_STORE,
  +                    QueryableStoreTypes.keyValueStore());
           } catch (InvalidStateStoreException e) {
               // ignore, store not ready yet
           }
  
positive.code:             return Response.ok(result.getResult().get()).build();
          }
          else {
              return Response.status(Status.NOT_FOUND.getStatusCode(), "No data found for weather station " + id).build();
          }
      }
  }
  
negative.code:     public Instant timestamp;
      public double value;
  
      public TemperatureMeasurement(int stationId, String stationName, Instant timestamp,
              double value) {
          this.stationId = stationId;
          this.stationName = stationName;
          this.timestamp = timestamp;
  