protected RegionFactory<?, ?> configureRegion(RegionFactory<?, ?> regionFactory) {
    return regionFactory;
  }
Override as needed to add to the configuration, such as regionFactory.setOffHeap(boolean).
geode-core/src/distributedTest/java/org/apache/geode/internal/cache/wan/asyncqueue/AsyncEventListenerWithCacheLoaderDistributedTest.java