嵌套枚举 C#

问：

我正在 Unity 中创建一个游戏，我希望在彼此内部有多个枚举，并使“下拉列表”在 Unity 中可见

public class ItemEnums{
public enum Type
    {
        CraftingMaterial,
        Equipment,
        Food,
        Miscellaneous
    }

    public enum FoodType
    {
        Potion,
        Edible,
        Drink
    }

    public enum EdibleType
    {
        Meat,
        Herbs,
        Fruit,
        Vegetables,
        ProcessedFood
    }



}
[CreateAssetMenu(fileName = "New Item", menuName = "Create new Item")]
[System.Serializable]
public class Items : ScriptableObject
{
    public int id;

    public string itemName;

    [TextArea(3, 3)] public string description;

    public GameObject prefab;
    public Texture icon;

    public int maxStack;
    public float weight;
    public int baseValue;



    public ItemEnums.Type type;

如您所见，我实例化了枚举类型，但是在选项 food 的类型中，我想实例化枚举 FoodType，而在 FoodType Edible 中，我想实例化 EdibleType，我该怎么做？