code: public StatisticImpl getStatistic() {
          if (enabled) {
              if (proxy == null) {
                  System.out.println("[SpdStatisticExternal] null proxy");
                  return null;
              }
  
              proxy.updateStatisticOnRequest(dataId);
  
              // onReqStatistic will be updated by the component
              // the reference is kept in this class
              return onReqStatistic;
          } else
              return null;
      }
docs: return a wire level data using given time as snapshotTime