mode example

  public function create(PackageInterface $package, OperationData $operation_data) {
    switch ($operation_data->mode()) {
      case SkipOp::ID:
        return new SkipOp();

      case ReplaceOp::ID:
        return $this->createReplaceOp($package, $operation_data);

      case AppendOp::ID:
        return $this->createAppendOp($package, $operation_data);
    }
    throw new \RuntimeException("Unknown scaffold operation mode <comment>{$operation_data->mode()}</comment>.");
  }