Catel.Data.ModelBase.HandleObjectEventsSubscription C# (CSharp) Метод

        private void HandleObjectEventsSubscription(string propertyName, object propertyValue)
        {
            if (DisableEventSubscriptionsOfChildValues)
            {
                return;
            }

            lock (_propertyValuesLock)
            {
                ChangeNotificationWrapper oldWrapper;

                if (_propertyValueChangeNotificationWrappers.TryGetValue(propertyName, out oldWrapper))
                {
                    oldWrapper.PropertyChanged -= OnPropertyObjectPropertyChanged;
                    oldWrapper.CollectionChanged -= OnPropertyObjectCollectionChanged;
                    oldWrapper.CollectionItemPropertyChanged -= OnPropertyObjectCollectionItemPropertyChanged;
                    oldWrapper.UnsubscribeFromAllEvents();
                }

                if (!ChangeNotificationWrapper.IsUsefulForObject(propertyValue))
                {
                    if (oldWrapper != null)
                    {
                        _propertyValueChangeNotificationWrappers.Remove(propertyName);
                    }
                }
                else
                {
                    var wrapper = new ChangeNotificationWrapper(propertyValue);
                    wrapper.PropertyChanged += OnPropertyObjectPropertyChanged;
                    wrapper.CollectionChanged += OnPropertyObjectCollectionChanged;
                    wrapper.CollectionItemPropertyChanged += OnPropertyObjectCollectionItemPropertyChanged;
                    _propertyValueChangeNotificationWrappers[propertyName] = wrapper;
                }
            }
        }