public virtual IDisposable Subscribe(IObserver <T> observer)
{
// Parent is not a tracked observable.
if (_parentInfo == null)
{
return(_parent.Subscribe(observer));
}
var subscriptionId = EventHandlerExtensions.OnSubscribe(_session, _childInfo, _parentInfo);
var disp = _parent.Subscribe(observer);
return(Disposable.Create(() =>
{
disp.Dispose();
EventHandlerExtensions.OnUnsubscribe(_session, subscriptionId);
}));
}
