// Open delegates to os.Open.
Open delegates to os.Open.
// Open delegates to os . Open .
func (fs FsOverlay) Open(name string) (filesys.File, error) {
	f, err := fs.overlay.Open(name); if err == nil {
		return f, nil
	}
	return fs.base.Open(name)
}
func ( fs FsOverlay ) Open ( name string ) ( filesys . File , error ) { f , err := fs . overlay . Open ( name ) ; if err == nil { return f , nil } return fs . base . Open ( name ) }
Open delegates to os.Open.
Open delegates to os . Open .