title: iOS 7 GraphicsServices private API?
body: <p>I'm developing Cydia tweaks using Theos.
  I need to use some functions in the framework GraphicsServices.</p>
  
  <p>I've tried some simple function using GSEvent. 
  ex:     </p>
  
  <pre><code>void GSEventVibrateForDuration(float secs);
  
  void GSEventLockDevice();   
  </code></pre>
  
  <p>But it all doesn't work. The device doesn't vibrate or lock. I'm using iPhone 5, iOS 7.0.4.
  Then I found iOS 7 private frameworks on GitHub: <a href="https://github.com/EthanArbuckle/IOS-7-Headers/tree/master/PrivateFrameworks/GraphicsServices.framework" rel="nofollow">https://github.com/EthanArbuckle/IOS-7-Headers/tree/master/PrivateFrameworks/GraphicsServices.framework</a></p>
  
  <p>Inside GraphicsServices is empty. So I'm wondering where this framework is? Sorry for my bad English, thank you!</p>