code: private void initNextWindow() {
      for (String syncPoint : mActivity.keySet()) {
        mActivity.put(syncPoint, mActivity.get(syncPoint).intValue() / 10);
        mAge.put(syncPoint, mAge.get(syncPoint).intValue() + 1);
      }
    }
docs: Start the accounting for the next window of events.
  
  This includes increasing the age of the unsynced syncpoints and decrease the activity of
  unsynced syncpoints.