// This methods allows classes to unregister for LearningEvents
public virtual void removeListener(LearningEventListener listener)
{
lock (this)
{
if (listener == null)
{
throw new System.ArgumentException("listener is null!");
}
listeners.Remove(listener);
}
}
// This methods allows classes to register for LearningEvents
public virtual void addListener(LearningEventListener listener)
{
lock (this)
{
if (listener == null)
{
throw new System.ArgumentException("listener is null!");
}
if (!listeners.Contains(listener))
{
listeners.Add(listener);
}
}
}
