// Start is called before the first frame update
void Start()
{
Courier.Register <BattleEvent>(Handler_One);
Courier.Register <BattleEvent>(Handler_Two);
Courier.Send(new BattleEvent()
{
id = 1
});
Courier.Unregister <BattleEvent>(Handler_One);
Courier.Send(new BattleEvent()
{
id = 3
});
}