@Override
 public void onCompleted(GraphUser me, Response response) {
   assertNotNull(me);
   assertEquals(session.getTestUserId(), me.getId());
   RequestTests.validateMeResponse(session, response);
   onCompleted(response);
 }
 @Override
 public void onCompleted(List<GraphUser> friends, Response response) {
   assertNotNull(friends);
   RequestTests.validateMyFriendsResponse(session, response);
   onCompleted(response);
 }