How to use the pyfuse3.close function in pyfuse3

logging.getLogger().setLevel(logging.DEBUG)

    argv = args.argv_prefix if args.argv_prefix else ("bash", "-c")
    operations = BashFS(argv_prefix=argv, separator=args.separator.encode())

    fuse_options = set(pyfuse3.default_options)
    fuse_options.add("fsname=bashfs")
    fuse_options.discard("default_permissions")
    if args.debug_fuse:
        fuse_options.add("debug")
    pyfuse3.init(operations, args.mountpoint, fuse_options)

    try:
        trio.run(pyfuse3.main)
    except:
        pyfuse3.close(unmount=True)
        raise

    pyfuse3.close()

operations = BashFS(argv_prefix=argv, separator=args.separator.encode())

    fuse_options = set(pyfuse3.default_options)
    fuse_options.add("fsname=bashfs")
    fuse_options.discard("default_permissions")
    if args.debug_fuse:
        fuse_options.add("debug")
    pyfuse3.init(operations, args.mountpoint, fuse_options)

    try:
        trio.run(pyfuse3.main)
    except:
        pyfuse3.close(unmount=True)
        raise

    pyfuse3.close()

def unmount():
            log.info("Unmounting file system...")
            pyfuse3.close(unmount=unmount_clean)
        cm.callback(unmount)