eZ\Publish\Core\Repository\Tests\Service\Integration\ContentBase::getLanguageCodesFromFields PHP Method

    protected function getLanguageCodesFromFields(array $fields, $mainLanguageCode)
    {
        $languageCodes = array($mainLanguageCode);
        foreach ($fields as $field) {
            $languageCodes[] = $field->languageCode;
        }
        return array_unique($languageCodes);
    }