private static RegionAttributes getDefaultAttributes(CacheCreation cc) {
    if (cc != null) {
      return cc.getDefaultAttributes();
    } else {
      return defaultAttributes;
    }
  }
True if usage of off-heap memory is enabled for this region.

@since Geode 1.0
geode-core/src/main/java/org/apache/geode/internal/cache/xmlcache/RegionAttributesCreation.java