title: Value of type 'JSON' has no member 'arrayOf'
body: <p>I am migrating code from Swift 2 to Swift 4. The following code works well in Swift 2 but gives error in Swift 4:</p>
  
  <pre><code>let unorderedComments = try? json.arrayOf("comments", type: Comment.self)
  </code></pre>
  
  <p>Error:</p>
  
  <blockquote>
    <p>Value of type 'JSON' has no member 'arrayOf'</p>
  </blockquote>
  
  <p>Does anyone know how to get rid of this error?</p>
  
  <p>EDIT:<br>
  I have used <a href="https://github.com/bignerdranch/Freddy" rel="nofollow noreferrer">Freddy</a> library for JSON Parsing</p>