class Containerizer {

  public Containerizer withAdditionalTag(String tag) {
    Preconditions.checkArgument(ImageReference.isValidTag(tag), "invalid tag '%s'", tag);
    additionalTags.add(tag);
    return this;
  }

  private  Containerizer(
      String description,
      ImageConfiguration imageConfiguration,
      Function<BuildContext, StepsRunner> stepsRunnerFactory,
      boolean mustBeOnline);

}