private static ParserManager _getDefaultParserManager()
{
if (_sDefaultParserManager == null)
{
ParserManager manager = new ParserManager();
_registerFactory(
manager, StyleSheetDocument.class, "StyleSheetDocument");
_registerFactory(manager, StyleSheetNode.class, "StyleSheetNode");
_registerFactory(manager, StyleNode.class, "StyleNode");
_registerFactory(manager, PropertyNode.class, "PropertyNode");