title: Cannot convert value of type ... in coercion
body: <p>Here is my error in swift 3.0</p>
  
  <p>Cannot convert value of type <code>(_, NSError?) -&gt; Void' to type 'GMSAutocompletePredictionsCallback' (aka '(Optional&lt;Array&lt;GMSAutocompletePrediction&gt;&gt;, Optional&lt;Error&gt;) -&gt; ()')</code> in coercion</p>
  
  <p>Here is my code</p>
  
  <p><img src="https://i.stack.imgur.com/7NCtr.png" alt="Please follow this link to view code"></p>