private void generateRegion(Region root) throws SAXException {
    if (version.compareTo(CacheXmlVersion.GEMFIRE_5_0) >= 0) {
      generate(root, REGION);
    } else {
      generate(root, VM_ROOT_REGION);
    }
  }
Called by the transformer to parse the "input source". We ignore the input source and, instead,
generate SAX events to the {@link #setContentHandler ContentHandler}.
geode-core/src/main/java/org/apache/geode/internal/cache/xmlcache/CacheXmlGenerator.java