public static DocumentBuilder getDocumentBuilder(boolean namespaceAware) {
        return getDocumentBuilder("com.sun.org.apache.xerces.internal.jaxp.DocumentBuilderFactoryImpl", null, namespaceAware);
    }
Creates a new XML DocumentBuilder.

@return a DocumentBuilder
@throws RuntimeException if we fail to create one
@param namespaceAware Whether the parser should be aware of xml namespaces
vespajlib/src/main/java/com/yahoo/text/XML.java