protected virtual void ApplyCollectionItemRemove(ApplyingCollectionChangeBundle bundle)
{
var contentContentChange = bundle.ContentContentChange;
var oldItems = contentContentChange.OldItems;
if (oldItems is null)
{
throw new ArgumentException("No old content-content-items were given although a remove collection change action has been triggered.");
}
var oldItemsCount = oldItems.Count;
var oldIndex = contentContentChange.OldIndex;
for (var oldItemIndex = oldItemsCount - 1; oldItemIndex >= 0; oldItemIndex--)
{
var removeIndex = oldItemIndex + oldIndex;
#if DEBUG
var removingContent = ContentList[removeIndex];
var oldContent = oldItems[oldItemIndex];
if (!EqualityComparer.Equals(removingContent, oldContent))
{
throw new Exception("Removing item is not equals old item that should be removed instead");
}
#endif
ItemList.RemoveAt(removeIndex);
ContentList.RemoveAt(removeIndex);
}
}
