title: SWIFT : Update Value NSDictionary
body: <p>NSDictionary in this example :</p>
  
  <pre><code>var example: [Int:AnyObject] = [1:["A":"val","B":[1:["B1":"val"]]]]
  </code></pre>
  
  <p>how to update "B1" value OR should i not use NSDictionary for this complex value?</p>
  
  <p>Thank you</p>