protected final <K, V> Region<K, V> createExpiryRootRegion(final String rootName,
      final RegionAttributes<K, V> attributes) throws RegionExistsException, TimeoutException {
    System.setProperty(LocalRegion.EXPIRY_MS_PROPERTY, "true");
    try {
      return createRootRegion(rootName, attributes);
    } finally {
      System.clearProperty(LocalRegion.EXPIRY_MS_PROPERTY);
    }
  }
Returns a region with the given name and attributes.
geode-dunit/src/main/java/org/apache/geode/test/dunit/cache/internal/JUnit4CacheTestCase.java