public function onRender(Event $event)
 {
     $serviceManager = $event->getApplication()->getServiceManager();
     $view = $serviceManager->getService('view');
     $viewModel = $event->getViewModel();
     $view->assign($viewModel->getVariables());
     return $view->fetch($viewModel->getTemplate());
 }
 public function onRender(Event $event)
 {
     $locale = $event->getApplication()->getServiceManager()->getService('locale');
     $viewModel = $event->getViewModel();
     $variables = $viewModel->getVariables();
     $variables = array_merge($variables, array('lang' => $locale->getLocale()));
     $viewModel->setVariables($variables);
     $event->setViewModel($viewModel);
 }