code: func (h *fs) ReadDir(path string) ([]os.FileInfo, error) {
  	fis, err := ioutil.ReadDir(path)
  	if runtime.GOOS == "windows" && err == nil {
  		h.enrichFileInfos(path, fis)
  	}
  	return fis, err
  }
docs: // ReadDir reads the directory named by dirname and returns a list of directory
  // entries sorted by filename.