title: Swift - [NSObject : AnyObject]!' is not a subtype of 'Dictionary<String, AnyObject>
body: <p>I got this error message</p>
  
  <pre><code>[NSObject : AnyObject]!' is not a subtype of 'Dictionary&lt;String, AnyObject&gt;
  </code></pre>
  
  <p>My code</p>
  
  <pre><code>self.client.getAccessToken(code, success: { (accessTokenData:Dictionary&lt;String, AnyObject&gt;) -&gt; Void in // error here
                      var accessToken = accessTokenData["access_token"]
                      self.requestMeWithToken(accessToken)
                      }, failure: { (error:NSError!) -&gt; Void in
                      println("Quering accessToken failed \(error)")
                  })
  </code></pre>