title: MPMusicPlayerController volume deprecated - will an app using it be rejected?
body: <p>I've never known it to happen before where Apple have deprecated a function because they've changed their mind about allowing developers access to it.</p>
  
  <p>I checked the <a href="https://developer.apple.com/appstore/resources/approval/guidelines.html" rel="nofollow">App Store Review Guidelines</a>, and there's no mention of it there.</p>
  
  <p>I'm curious - would an app be rejected for using this deprecated function, or is it simply deprecated because Apple may stop supporting it in the future, possibly in iOS 8, and thus current apps using it are fine.</p>