text: #ifndef INVENTORY_ITEM_TYPE_H
  #define INVENTORY_ITEM_TYPE_H
  
  #include <string>
  #include <vector>
  
  namespace inventory {
  
  enum ItemType { iPod = 0, iPhone = 1, UnknownItem = 2 };
  
  inline std::vector<ItemType> getAllItemTypes() {
    return {iPod, iPhone};
  }
  
  ItemType itemTypeFromString(const std::string&);
  
  }  // namespace inventory
  
  #endif
  