public String getTooltipExtraText(final Province current) {
        if (!Main.map.isLand(current.getId()))
            return "";
        
        StringBuilder ret = new StringBuilder("Regions: ");
        List<String> regions = Main.map.getRegionsOfProv(current.getId());
        java.util.Iterator<String> itr = regions.iterator();
        while (itr.hasNext()) {
            ret.append(itr.next());
            if (itr.hasNext())
                ret.append(", ");
        }
        
        return ret.toString();
    }