code: func Mount(dir string) (*Conn, error) {
  	// TODO(rsc): mount options (...string?)
  	fd, errstr := mount(dir)
  	if errstr != "" {
  		return nil, errors.New(errstr)
  	}
  
  	return &Conn{fd: fd}, nil
  }
docs: // Mount mounts a new FUSE connection on the named directory
  // and returns a connection for reading and writing FUSE messages.