title: Necessity of -> Void in Swift
body: <p>In the following code (using the Parse library), I have:</p>
  
  <pre><code>query.findObjectsInBackgroundWithBlock({(objects: [AnyObject]?, error: NSError?) -&gt; Void in
      // yada yada
  })
  </code></pre>
  
  <p>Is the <code>-&gt; Void in</code> necessary in the code (rather, is there something else I can use?  Removing it throws errors in Xcode.)?</p>
  
  <p>I am <em>very</em> new to Swift, so this may be a dumb question...</p>