Before.swift

func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    if let promotion = recipes[indexPath.row].promotion {
      let promotedCell = tableView.dequeueReusableCell(withIdentifier: "promoted", for: indexPath) as! PromotedRecipeCell
      promotedCell.recipe = recipe
      promotedCell.promotion = promotion
      return promotedCell
    } else {
      let normalCell = tableView.dequeueReusableCell(withIdentifier: "normal", for: indexPath) as! RecipeCell
      normalCell.recipe = recipe
      return normalCell
    }
}