/**
* Detecting new language elements.
* @return string
*/
public function run()
{
$scanner = new Scanner();
$scanner->run();
$newDataProvider = $this->controller->createLanguageSourceDataProvider($scanner->getNewLanguageElements());
$oldDataProvider = $this->_createLanguageSourceDataProvider($scanner->getRemovableLanguageSourceIds());
return $this->controller->render('scan', ['newDataProvider' => $newDataProvider, 'oldDataProvider' => $oldDataProvider]);
}