magento2.3 – Can the round method be intercepted?


I’m trying to override the round method in vendormagentomodule-directoryModelPriceCurrency.php. This is the method:

/**
 * @inheritdoc
 */
public function round($price)
{
    return round($price, 2);
}

And this is the code I have in a plugin to override the above method:

class PriceCurrency
{
    public function aroundRound(MagentoDirectoryModelPriceCurrency $subject, callable $proceed, $price) {
        return round($price, 4);
    }
}

My code doesn’t work. I can easily override other public methods in the PriceCurrency file! Can that method be overridden?