title: How to add a UIView on top of MessageKit's messagesCollectionView
body: <p>I am trying to add a UIView on top of the messagesCollectionView, but the collectionview seems to take up the whole screen making the UIView I want to add unable to be seen. I am looking at their  documentation here: <a href="https://github.com/MessageKit/MessageKit/blob/master/Sources/Layout/MessagesCollectionViewFlowLayout.swift" rel="nofollow noreferrer">https://github.com/MessageKit/MessageKit/blob/master/Sources/Layout/MessagesCollectionViewFlowLayout.swift</a></p>
  <p>My thoughts are to change something in the Layout delegate but I am unsure what and where to change... any thoughts on this would be appreciated!</p>
  <p>Thanks!</p>