title: Array of Any call function append.contentsOf syntax error in Swift 3.2
body: <pre><code>var dataSource: [Any] = []
  </code></pre>
  
  <p>I declare array like above, then when I do</p>
  
  <pre><code>// fetchedData is an array of Swift object
  dataSource.append(contentsOf: fetchedData)
  </code></pre>
  
  <p>I am have compile error saying <code>Extraneous argument label 'contentsOf:' in call</code>
  The <code>[Any]</code> type thinks I am passing a single object, I don't prefer to change the dataSource type to a specific one. Is there a way to solve this?</p>