protected function addLocaleToResource(Resource $oResource): void
    {
        /** @var Locale $oLocale */
        $oLocale = Factory::service('Locale');

        //  Add the locale for _this_ item
        $oResource->locale = $this->getLocale(
            $oResource->{static::$sColumnLanguage},
            $oResource->{static::$sColumnRegion}
        );

        //  Set the locales for all _available_ items
        $oResource->available_locales = array_map(function ($sLocale) use ($oLocale) {
            list($sLanguage, $sRegion) = $oLocale::parseLocaleString($sLocale);
            return $this->getLocale($sLanguage, $sRegion);
        }, explode(',', $oResource->available_locales));

        //  Specify which locales are missing
        $oResource->missing_locales = array_diff(
            $oLocale->getSupportedLocales(),
            $oResource->available_locales
        );

        //  Remove internal fields
        unset($oResource->{static::$sColumnLanguage});
        unset($oResource->{static::$sColumnRegion});
    }