diff --git a/Generics.playground/Contents.swift b/Generics.playground/Contents.swift
index ef89622..3ef259b 100644
--- a/Generics.playground/Contents.swift
+++ b/Generics.playground/Contents.swift
@@ -2,48 +2,57 @@ import UIKit
 
 protocol Configurable {
     associatedtype U
-    func configure(with data:U)
+    mutating func configure(with data:U)
 }
 
-class ArrayVC<Cell: UITableViewCell> : UITableViewController where Cell:Configurable {
-    var data:[Configurable.associatedtype] = []
+struct Element : Configurable {
+    typealias U = String
+    
+    var name: String?
+    
+    internal mutating func configure(with data: String) {
+        name = data
+    }
+}
 
+class ArrayVC<Cell: UITableViewCell> : UITableViewController where Cell:Configurable {
+    
+    var data = [Element]()
+    
     let cellID = "cell"
-
+    
     override func viewDidLoad() {
         super.viewDidLoad()
         tableView.register(Cell.self, forCellReuseIdentifier: cellID)
     }
-
+    
     override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
         return data.count
     }
-
+    
     override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
         let cell = tableView.dequeueReusableCell(withIdentifier: cellID, for: indexPath) as! Cell
         cell.configure(with: data[indexPath.row])
         return cell
     }
-
+    
 }
 
 extension UITableViewCell: Configurable {
-    typealias U = String
-
-    func configure(with data: UITableViewCell.U) {
-        textLabel?.text = data
+    typealias U = Element
+    
+    func configure(with data: Element) {
+        textLabel?.text = data.name
     }
 }
 
-
 class MyVC : ArrayVC<UITableViewCell> {
-
+    
     override func viewDidLoad() {
         super.viewDidLoad()
-        data = ["John", "Ben", "Alice"]
+        data = [Element(name: "John"), Element(name: "Ben"), Element(name: "Alice")]
         title = "Array View Controller"
     }
-
 }
 
 import PlaygroundSupport
diff --git a/Generics.playground/playground.xcworkspace/xcuserdata/icarlitux.xcuserdatad/UserInterfaceState.xcuserstate b/Generics.playground/playground.xcworkspace/xcuserdata/icarlitux.xcuserdatad/UserInterfaceState.xcuserstate
new file mode 100644
index 0000000..5e7f660
Binary files /dev/null and b/Generics.playground/playground.xcworkspace/xcuserdata/icarlitux.xcuserdatad/UserInterfaceState.xcuserstate differ
diff --git a/Generics.playground/timeline.xctimeline b/Generics.playground/timeline.xctimeline
deleted file mode 100644
index bf468af..0000000
--- a/Generics.playground/timeline.xctimeline
+++ /dev/null
@@ -1,6 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<Timeline
-   version = "3.0">
-   <TimelineItems>
-   </TimelineItems>
-</Timeline>