仅在线图之间的背景颜色（GraphView）

Question

图书馆：graphview 版本：4.2.1

是否可以在两条曲线之间设置背景颜色？像这样：

setDrawBackground改变曲线和坐标线之间的颜色，这不是我需要的：

exaple代码：

        LineGraphSeries<DataPoint> seriesUp = new LineGraphSeries<>(new DataPoint[]{
            new DataPoint(0, 3),
            new DataPoint(1, 7),
            new DataPoint(2, 5),
            new DataPoint(3, 4),
            new DataPoint(4, 8)
    });
    graph.addSeries(seriesUp);
    seriesUp.setDrawBackground(false);
    seriesUp.setColor(Color.MAGENTA);
    seriesUp.setDrawBackground(true);


    LineGraphSeries<DataPoint> series = new LineGraphSeries<>(new DataPoint[]{
            new DataPoint(0, 2),
            new DataPoint(1, 6),
            new DataPoint(2, 4),
            new DataPoint(3, 3),
            new DataPoint(4, 7)
    });
    graph.addSeries(series);
    graph.getViewport().setScalableY(true);
    series.setThickness(5);
    series.setColor(Color.RED);
    series.setAnimated(true);
    series.setDrawDataPoints(true);
    series.setDataPointsRadius(10);
    series.setBackgroundColor(Color.CYAN);
    series.setDrawBackground(false);