How to use the cmarkgfm._cmark.lib.cmark_node_get_type function in cmarkgfm

extension = find_syntax_extension(extension_name)
        if extension is None:
            raise ValueError('Unknown extension {}'.format(extension_name))
        cmark_extensions.append(extension)

    parser = parser_new(options=options)

    try:
        for extension in cmark_extensions:
            parser_attach_syntax_extension(parser, extension)

        parser_feed(parser, text)

        root = parser_finish(parser)

        if _cmark.lib.cmark_node_get_type(root) == _cmark.lib.CMARK_NODE_NONE:
            raise ValueError('Error parsing markdown!')

        extensions_ll = parser_get_syntax_extensions(parser)

        output = render_html(root, options=options, extensions=extensions_ll)

    finally:
        parser_free(parser)

    return output