public void Unsubscribe(IAntlrObserver observer)
{
if (observers.Contains(observer))
{
observers.Remove(observer);
}
}
public IDisposable Subscribe(IAntlrObserver observer)
{
if (!observers.Contains(observer))
{
observers.Add(observer);
}
return(new Unsubscriber(observers, observer));
}
public Unsubscriber(List <IAntlrObserver> observers, IAntlrObserver observer)
{
this._observers = observers;
this._observer = observer;
}
