Unity3d event 이벤트

using UnityEngine.Events;
public class MainClass : MonoBehaviour{
    public UnityEvent simpleEvent;

    public void Start(){
        simpleEvent.AddListener(Ping); //이벤트 등록
        simpleEvent.Invoke(); //이벤트 호출
    }
    public void Ping(){
        Debug.Log("ping!");
    }
}

using UnityEngine.Events;

[Serializable]
public class RayEvent : UnityEvent<string,GameObject>{}

public class MainClass : MonoBehaviour{
    public RayEvent pressEvents;
    public RayEvent releaseEvents;
}