Android : Android GCM IntentService loop "doing some work"?

I am using Google Cloud Messaging in an Android app and I was wondering what is the purpose of this part of the code in the IntentService, once the GCM message has been received and before processing:

// This loop represents the service doing some work.
for (int i = 0; i < 5; i++) {
   if (D) Log.i(TAG, "Working... " + (i + 1) + "/5 @ " + SystemClock.elapsedRealtime());
   try {
        Thread.sleep(5000);
    } catch (InterruptedException e) {
    }
}

Any thoughts about it? Thanks!