Setup an xmltextReader to parse an XML in-memory document.
          The parsing flags @options are a combination of
          xmlParserOption. This reuses the existing @reader
           xmlTextReader.

def NewDoc(self, cur, URL, encoding, options):
        """Setup an xmltextReader to parse an XML in-memory document.
          The parsing flags @options are a combination of
          xmlParserOption. This reuses the existing @reader
           xmlTextReader. """
        ret = libxml2mod.xmlReaderNewDoc(self._o, cur, URL, encoding, options)
        return ret