@Override
  public Region getSubregion(String path) {
    Region region = realRegion.getSubregion(path);
    return region != null ? new ProxyRegion(proxyCache, region, statisticsClock) : null;
  }
A wrapper class over an actual Region instance. This is used when the multiuser-authentication
attribute is set to true.

@see ProxyCache
@since GemFire 6.5
geode-core/src/main/java/org/apache/geode/cache/client/internal/ProxyRegion.java