title: android.support.v4.app.Fragment: undefined method getChildFragmentManager()
body: <p>I'm using <code>ActionBarSherlock</code> and <code>ViewPageIndicator</code> and I tried to implement nested fragments, but the method <code>getChildFragmentManager()</code> is undefined in my<code>android.support.v4.app.Fragments</code>. </p>
  
  <p>There are no other errors and ABS and VPI work as expected.</p>
  
  <p>I'm not using the Support Library v13, I'm on the latest versions and I've cleaned my projects. A normal <code>android.app.Fragment</code> does not complain about <code>getChildFragmentManager()</code>. </p>
  
  <p>I also tried rearranging the support library dependencies (android-support-v4.jar in ABS, VPI and main project referencing it, or android-support-v4.jar in as external jar), but <code>getChildFragmentManager()</code> remains undefined.</p>
  
  <p>If I remove the VPI though, <code>getChildFragmentManager()</code> works, but of course VPI stops working. So, there must be something wrong with the dependencies, but I'm running out of ideas to try. </p>
  
  <p>Any help would be much appreciated!</p>