Piwik\Common::checkValidLanguagesIsSet PHP Méthode

    protected static function checkValidLanguagesIsSet($validLanguages)
    {
        /** @var LanguageDataProvider $dataProvider */
        $dataProvider = StaticContainer::get('Piwik\\Intl\\Data\\Provider\\LanguageDataProvider');
        if (empty($validLanguages)) {
            $validLanguages = array_keys($dataProvider->getLanguageList());
            return $validLanguages;
        }
        return $validLanguages;
    }