title: Get list of folder and files within Assets.xcassets
body: <p>I have 2 questions:</p>
  
  <ol>
  <li><p>I'm adding large amount of mp3 files into Assets.xcassets, is there any performance issue with this?</p></li>
  <li><p>Within Assets.xcassets, I create folders &amp; sub folders, and put mp3 files in those folders. Now in my code, I want to get list of those folders name and also list of files inside that folder. Is it possible?</p></li>
  </ol>