void closeCacheCallback(CacheCallback cb) {
    if (cb != null) {
      try {
        cb.close();
      } catch (RuntimeException ex) {
        logger.warn("CacheCallback close exception",
            ex);
      }
    }
  }
Update the lastAccessedTime and lastModifiedTimes to reflects those in the subregions
geode-core/src/main/java/org/apache/geode/internal/cache/AbstractRegion.java