protected void paintProvince(Graphics2D g, int provId) {
        final String goods = mapPanel.getModel().getHistString(provId, "trade_goods");
        if (goods == null) {
            mapPanel.paintProvince(g, provId, Utilities.COLOR_NO_HIST);
        } else if (goods.length() == 0 || goods.equalsIgnoreCase("none")) {
            mapPanel.paintProvince(g, provId, Utilities.COLOR_NO_GOODS);
        } else {
            mapPanel.paintProvince(g, provId, Utilities.getGoodsColor(goods));
        }
    }