#38 model property of the event (both for collection and cells) is no…

…w optional because it may be nil in certain situations (ie. didEndDisplayCell events)

Sources/Owl/Collection/Cell Adapter/CollectionCellAdapter+Events.swift

@@ -20,7 +20,7 @@ public extension CollectionCellAdapter {
 		public let indexPath: IndexPath?
 
 		/// Represented model instance
-		public let element: Model
+		public let element: Model?
 
 		/// Managed source collection
         public var collection: UICollectionView? {
@@ -50,7 +50,7 @@ public extension CollectionCellAdapter {
 		///   - path: cell's path
 		///   - collection: parent cell's collection instance
 		internal init(element: Any?, cell: Any?, path: IndexPath?) {
-			self.element = element as! Model
+			self.element = element as? Model
 			self.cell = cell as? Cell
 			self.indexPath = path
 		}

Sources/Owl/Table/Cell Adapters/TableCellAdapter+Events.swift

@@ -51,14 +51,14 @@ public extension TableCellAdapter {
 		public let indexPath: IndexPath?
 
 		// Target element of the event.
-		public let element: Model
+		public let element: Model?
 
 		// Target static typed cell if available.
 		// This value maybe `nil` if, at the time of the request, no cell is contextually associable with the event.
 		public var cell: Cell?
 
 		internal init(item: Any? = nil, cell: Any? = nil, indexPath: IndexPath? = nil) {
-			self.element = item as! Model
+			self.element = item as? Model
 			self.cell = cell as? Cell
 			self.indexPath = indexPath
 		}