/// <summary>
/// Unregisters a listener to this event.
/// </summary>
/// <param name="listener">The event listener that will be removed.</param>
public virtual void RemoveListener(ES_EventListener listener)
{
if (listeners.Contains(listener))
{
listeners.Remove(listener);
}
}
/// <summary>
/// Registers a new listener to this event. A listener cannot subscribe to an event more than once.
/// </summary>
/// <param name="listener">The event listener that wants to listen to this event.</param>
public virtual void AddListener(ES_EventListener listener)
{
if (!listeners.Contains(listener))
{
listeners.Add(listener);
}
}