public static final ObjectAllocator XML_SAXPARSER_CONTEXT_ALLOCATOR = new ObjectAllocator()
  {
    private XmlSaxParserContext xmlSaxParserContext = null;
    public IRubyObject allocate(Ruby runtime, RubyClass klazz) {
      if (xmlSaxParserContext == null) { xmlSaxParserContext = new XmlSaxParserContext(runtime, klazz); }