code: func AddPrefix(path string) string {
  	if !strings.HasPrefix(path, Prefix) {
  		if strings.HasPrefix(path, `\\`) {
  			// This is a UNC path, so we need to add 'UNC' to the path as well.
  			path = Prefix + `UNC` + path[1:]
  		} else {
  			path = Prefix + path
  		}
  	}
  	return path
  }
docs: // AddPrefix will add the Windows long path prefix to the path provided if
  // it does not already have it.