title: Name convention for unwrapped value in Swift
body: <p>When I unwrap a value in Swift, I'm always uncertain on how to name the variabile which will contain it:</p>
  
  <pre><code>override func touchesCancelled(touches: Set&lt;UITouch&gt;?, withEvent event: UIEvent?) {
  
      if let unwrappedTouches = touches
      {
          ....
      }
  
  }
  </code></pre>
  
  <p>Is there some <em>popular-among-Swift-coders</em> naming convention?</p>