Javascript 谷歌床单烛台图修改高低线宽？

我一直在使用谷歌的烛台图表，并根据我的需要定制一切，只是烛台上下线条的宽度不能修改，或者我根本没有找到这样做的方法。我的代码如下所示：

<script type="text/javascript" src="https://www.google.com/jsapi?autoload={'modules':[{'name':'visualization','version':'1.1','packages':['corechart']}]}"></script>
<script>
google.setOnLoadCallback(drawChart);

function drawChart() {
    var data = google.visualization.arrayToDataTable([
        ['Mon', 20, 28, 38, 45],
        ['Tue', 31, 38, 55, 66],
        ['Wed', 50, 55, 77, 80],
        ['Thu', 77, 77, 66, 50],
        ['Fri', 68, 66, 22, 15]
        // Treat first row as data as well.
        ], true);

    var chart = new google.visualization.CandlestickChart(document.getElementById('chart_div'));

    chart.draw(data, {
        selectionMode: 'multiple',
        backgroundColor: {
            strokeWidth: 3,
            stroke: 'black',
        },
        vAxis: {
            gridlines: {
                count: -1,
            },
            minorGridlines: {
                count: 4,
            }
        },
        hAxis: {
            textStyle: {
                color: 'white',
            }
        },
        focusTarget: 'category',
        colors: ['black', 'black'],
        legend: 'none',
        theme: 'maximized',
        candlestick: {
            hollowIsRising: 'false',
            risingColor: {
                fill: 'green',
                stroke: 'black',
                strokeWidth: 1, // Here you can clearly see that I changed the candlestick's stroke to a smaller value which would basically be the same as decreasing the "border width".
            },
            fallingColor: {
                fill: 'red',
                stroke: 'black',
                strokeWidth: 1, // Here you can clearly see that I changed the candlestick's stroke to a smaller value which would basically be the same as decreasing the "border width".
            }
        }
    });
}
</script>
       <div id="chart_div" style="width: 900px; height: 500px;"></div>

---

可悲的是，它不起作用。希望你们有一些想法。国王问候

我对那些图表不熟悉，上面和下面的线叫什么？以防万一你想看一看。嗨@hoshhunt，我已经读了10遍烛台API了，没有发现任何东西。我也研究过其他网站，但没有哪个网站给出具体的说明。我从金融学知道的是，顶线是高的，下面是低的。“高”将等同于“上”阴影，“低”将等同于“下”阴影，这些是业务中提到的术语。就javascript而言，我真的不知道该寻找什么。谢谢你的快速回复！！有可能没有办法改变它，API显然没有提到任何东西。

    bar: {
        strokeWidth: 1,
    },