title: Ambiguous use of 'subscript' in swift 3 using xcode 8
body: <p>I am getting issues of Ambiguous use of 'subscript' as per mentioned in Screen Shot that is attached here. I am trying to use Alamofire for api calling. is there any issues of xcode 8 ? i am using swift 3 with xcode 8 in IOS 10. Will anybody please help me to fix this issue?
  <a href="https://i.stack.imgur.com/EuidK.png" rel="nofollow"><img src="https://i.stack.imgur.com/EuidK.png" alt="enter image description here"></a></p>