 import RocketChatViewController
 import RealmSwift
 import DifferenceKit
+
+private typealias NibCellIndentifier = (nib: UINib, cellIdentifier: String)
 
 protocol SizingCell: class {
     static var sizingCell: UICollectionViewCell & ChatCell { get }

                    controller.subscription = subscription
                }
            }
        }
    }



        composerView.delegate = self

        registerCells()
        setupScrollToBottom()

        NotificationCenter.default.addObserver(
