title: when the method OnUnregistered() will be invoked in GCMIntentService Class
body: <p>I have successfully implemented the <code>GCM</code> framework for push notification in my android application.But I am little bit confused about the function overridden in <code>GcmIntentService</code> Class by Google.</p>
  
  <pre><code>@Override
  protected void onUnregistered(Context context, String registrationId) {
  
  //Do whatever you want
  </code></pre>
  
  <p>}</p>
  
  <p>When this method will get invoked ?</p>