code: func (fs *LanguageFs) Open(name string) (afero.File, error) {
  	name, err := fs.realName(name)
  	if err != nil {
  		return nil, err
  	}
  	f, err := fs.Fs.Open(name)
  
  	if err != nil {
  		return nil, err
  	}
  	return &languageFile{File: f, fs: fs}, nil
  }
docs: // Open opens the named file for reading.