Using DiffableBox with ListAdapterDataSource

MessagesViewController.swift

extension MessagesViewController: ListAdapterDataSource {
    
    func objects(for listAdapter: ListAdapter) -> [ListDiffable] {
        var objects:Array<ListDiffable> = Array<ListDiffable>()
        for item in data {
            switch item {
            case is String:
                objects.append(item as! ListDiffable)
            case is TicketShort:
                objects.append((item as! TicketShort).diffable())
            default:
                break
            }
        }
        return objects
    }
    
    func listAdapter(_ listAdapter: ListAdapter, sectionControllerFor object: Any) -> ListSectionController {
        switch object {
        case is String:
            return HeaderSectionController()
        case is DiffableBox<TicketShort>:
            return TicketSectionController(delegate: self)
        default:
            return HeaderSectionController()
        }
    }
    
    func emptyView(for listAdapter: ListAdapter) -> UIView? { return nil }
    
}