How to use the pyfuse3.syncfs function in pyfuse3

if args is None:
        args = sys.argv[1:]

    options = parse_args(args)
    setup_logging(options)

    for name in options.path:
        if os.path.ismount(name):
            raise QuietError('%s is a mount point.' % name)

        ctrlfile = assert_fs_owner(name)
        fstat_p = os.stat(os.path.dirname(os.path.abspath(name)))

        # Make sure that write cache is flushed
        pyfuse3.syncfs(name)

        cmd = ('(%d, %r)' % (fstat_p.st_ino,
                             path2bytes(os.path.basename(name)))).encode()
        pyfuse3.setxattr(ctrlfile, 'rmtree', cmd)

raise QuietError('Target parent %r is not a directory' % parent)

    if fstat_p.st_dev != fstat_s.st_dev:
        raise QuietError('Source and target are not on the same file system.')

    if os.path.ismount(options.source):
        raise QuietError('%s is a mount point.' % options.source)

    ctrlfile = assert_fs_owner(options.source)
    try:
        os.mkdir(options.target)
    except PermissionError:
        raise QuietError('No permission to create target directory')

    # Make sure that write cache is flushed
    pyfuse3.syncfs(options.target)

    fstat_t = os.stat(options.target)
    pyfuse3.setxattr(ctrlfile, 'copy',
                     ('(%d, %d)' % (fstat_s.st_ino, fstat_t.st_ino)).encode())