// clear all items from a single chest
    private void ClearChest(Chest chest)
    {
        chest.ClearChest();

        Undo.RecordObject(chest, "Chest Clear");
        EditorUtility.SetDirty(chest);
    }
    /**
     * Add a list of items to one chest
     */
    private void AddToChest(Chest chest, bool clearOnAdd, List <InventoryItem> items)
    {
        if (clearOnAdd)
        {
            chest.ClearChest();
        }

        foreach (InventoryItem item in items)
        {
            chest.AddToChest(item);
        }

        // tell the editor that the object has been changed
        // this prevents changes from disappearing when going into play mode
        // I believe there is a more current way to do this, but I haven't figured it out yet
        Undo.RecordObject(chest, "Chest Modify");
        EditorUtility.SetDirty(chest);
    }