How can I send a UnityEvent to specific instance of a GameObject? - unity3d

Question

I have a prefab representing a room. I have a unity event that is fired when a player enters, I have an event listener that changes the state of the room when the event is raised. it also changes the state of any copies of the prefab instead of the room that triggered the event.
How do I narrow the scope of an event to only the instance of the gameobject that triggers the event?
private void OnTriggerEnter2D(Collider2D other)
{
if (other.CompareTag("Player"))
{
RoomEnter.Raise();
}
public class GameEventListener : MonoBehaviour
{
[Tooltip("Event to register with.")]
public GameEvent Event;
[Tooltip("Response to invoke when Event is raised.")]
public UnityEvent Response;
private void OnEnable()
{
Event.RegisterListener(this);
}
private void OnDisable()
{
Event.UnregisterListener(this);
}
public void OnEventRaised()
{
Response.Invoke();
}
}
public class GameEvent : ScriptableObject
{
/// The list of listeners that this event will notify if it is raised.
private readonly List<GameEventListener> eventListeners =
new List<GameEventListener>();
public void Raise()
{
for(int i = eventListeners.Count -1; i >= 0; i--)
eventListeners[i].OnEventRaised();
}
public void RegisterListener(GameEventListener listener)
{
if (!eventListeners.Contains(listener))
eventListeners.Add(listener);
}
public void UnregisterListener(GameEventListener listener)
{
if (eventListeners.Contains(listener))
eventListeners.Remove(listener);
}
}

Answer 1

Why use event? When the player enter, just call the method of THIS room.
private void OnTriggerEnter2D(Collider2D other)
{
if (other.CompareTag("Player"))
{
GetComponent<GameEventListener>().OnEventRaised();
}
}