@Override
      public Object call() throws IOException {
        DynamicRegionFactory.get().open();
        Cache cache = getCache();
        CacheServer bridge = cache.addCacheServer();
        bridge.setPort(port);
        bridge.setNotifyBySubscription(true);
        bridge.start();
        return null;
      }
Tests the groups subelement on bridge-server.
geode-core/src/distributedTest/java/org/apache/geode/cache30/CacheXml66DUnitTest.java