Here's what I did... added the 4th generic like you mentioned created another "class footHeader: UICollectionReusableView" (just copied the existing header class and renamed it)....then I called the "referenceSizeForFooterInSection" with " return.init(width: 0, height: 200)" in the LBTAListHeaderFooterController class.....I got Nothing....what am I forgetting?
For the inputAccessoryView I saw how you did it just was wondering if you would've use a footer because the lesson came BEFORE the updated LBTA tools(ListHeaderFooterController)