public static function doSetUpBeforeClass()
{
self::$st = new SchemaTool(self::$em);
self::$st->createSchema([self::$em->getClassMetadata(Language::clazz())]);
self::$st->createSchema([self::$em->getClassMetadata(TranslationToken::clazz())]);
self::$st->createSchema([self::$em->getClassMetadata(LanguageTranslationToken::clazz())]);
}