public void UseItemInBattle(UsableItem item, Action <UsableItem> OnFinished)
{
if (manager == null)
{
manager = GameObject.FindGameObjectWithTag("GameController").GetComponent <GameManager>();
}
StartCoroutine(item.OnBattleUse(manager, OnFinished));
Backpack backpack = manager.GetBackpack();
backpack.items.Remove(item);
}
