google-visualization - 谷歌图表 API

Question

我正在使用谷歌图表 API 绘制 3d 曲面图。我想在里面画网格线。我在互联网上搜索并尝试了所有解决方案。但没有一个在工作。

var options = {xPos: 0, yPos: 0, width: 600, height: 500, colourGradient: colours,
               fillPolygons: fillPly, tooltips: tooltipStrings, xTitle: xAxisHeader,
               yTitle: yAxisHeader, zTitle: zAxisHeader, restrictXRotation: false,
               tooltip : {isHtml : true},
               backgroundColor : {fill :"#424240",stroke: 'silver'},
               chg: '1,1',
               hAxis: {gridlines: {color: '#000000', count: 3}},
               vAxis: {gridlines: {color: '#DCDCDC', count: 5}},
               series: {
                   0:{color: '#207795', lineWidth: 4, pointSize: 10},
                   1:{color: '#464A54', lineWidth: 4, pointSize: 10},
                 }};

谁能帮我？