// using the semantics of fs.FS.Open:
// paths are always slash separated, with no
// leading / or ../ elements.
func (r *Reader) Open(name string) (fs.File, error) {
	r.initFileList()

	if !fs.ValidPath(name) {
		return nil, &fs.PathError{Op: "open", Path: name, Err: fs.ErrInvalid}
	}
	e := r.openLookup(name)
	if e == nil {
		return nil, &fs.PathError{Op: "open", Path: name, Err: fs.ErrNotExist}
	}

		return errInvalidArgument
	}

	if r.Source.Endpoint != "" && !r.Source.Type.isMinio() && !r.Source.ValidPath() {
		return errInvalidArgument
	}

	if r.Target.Endpoint != "" && !r.Target.Type.isMinio() && !r.Target.ValidPath() {
		return errInvalidArgument
	}

	if !r.Target.Creds.Empty() {
		if err := r.Target.Creds.Validate(); err != nil {
			return err