title: subpathsAtPath vs subpathsOfDirectoryAtPath
body: <p>What's the difference between <code>NSFileManager.subpathsAtpath</code> and <code>NSFileManager.subpathsOfDirectoryAtPath</code>?</p>
  
  <p>Both seem to get nested directories and files, and the <a href="https://developer.apple.com/library/mac/documentation/Cocoa/Reference/Foundation/Classes/NSFileManager_Class/#//apple_ref/occ/instm/NSFileManager/subpathsAtPath:" rel="nofollow">docs</a> doesn't say much.</p>