I'm solving certain issues with currencies and rounding in our system. While doing that I noticed method NumberFormatter::roundCurrency() which applies something called "Swiss rounding"? I'm not quite sure what it is about but it calls method Intl::getCurrencyBundle()->getRoundingIncrement($currency);. Now here is the strange thing, this method currently returns 0 for all currencies - meaning that the swiss rounding is never actually used. Is that correct? If it is than what's the point of this method and swiss rounding?

        // this code never dumps anything
        $cbundle = Intl::getCurrencyBundle();
        foreach ($cbundle->getCurrencyNames() as $code => $name) {
            if ($cbundle->getRoundingIncrement($code) !== 0) {
                dump([
                    $code,
                    $cbundle->getRoundingIncrement($code),
                ]);
            }
        }