code: func ConvertSavedFile(dockerSavedFile string, config FileConfig) ([]string, error) {
  	config.initLogger()
  
  	f, err := os.Open(dockerSavedFile)
  	if err != nil {
  		return nil, fmt.Errorf("error opening file: %v", err)
  	}
  	defer f.Close()
  
  	return (&converter{
  		backend:   file.NewFileBackend(f, config.Debug, config.Info),
  		dockerURL: config.DockerURL,
  		config:    config.CommonConfig,
  	}).convert()
  }
docs: // ConvertSavedFile generates ACI images from a file generated with "docker
  // save".  If there are several images/tags in the file, a particular image can
  // be chosen via FileConfig.DockerURL.
  //
  // It returns the list of generated ACI paths.