title: Get song title from MPMediaItemCollection
body: <p>I'm trying to rewrite my old player from Objective-C to Swift (by memory) and got in trouble. I've got array of songs like this</p>
  
  <pre><code>let query = MPMediaQuery.songsQuery()
  query.groupingType = MPMediaGrouping.Title
  songsArray = query.collections
  </code></pre>
  
  <p>Next in my table view I'm trying to get the name of each media item to put in the <code>cell.textLabel</code>. Like this:</p>
  
  <pre><code>var mediaItem = songsArray.objectAtIndex(indexPath.row)
  var title = mediaItem.valueForProperty(MPMediaItemPropertyTitle)
  </code></pre>
  
  <p>But I'm not getting MPMediaItems, I'm getting the collection of items. So how can I take MPMediaItem from array of MPMediaItemCollections and get the title?</p>