更改默认图标工具栏（传单）

我如何将默认工具栏图标更改为传单上的其他图标..

上面的图片显示了图标的默认视图。我想自定义图标并将其更改为其他图标，例如我希望第一个图标看起来像桥梁和第二个文本图标等等。

我已经尝试了几种方法但没有成功。

这是我的代码

var electricpole = L.Icon.extend({
        options: {
            shadowUrl: null,
            iconAnchor: new L.Point(12, 12),
            iconSize: new L.Point(30,30),
            iconUrl: 'image/electricpole.png'
        }
    });

L.DrawToolbar.include({
        getModeHandlers: function(map:L.Map) {
            return [
                {
                    enabled: true,
                    handler: new L.Draw.Polyline(map),
                    title: 'Draw Polyline'
                },
                {
                    enabled: true,
                    handler: new L.Draw.Polygon(map),
                    title: 'Draw Polygon'
                },
                {
                    enabled: true,
                    handler: new L.Draw.Rectangle(map),
                    title: 'Draw Rectangle'
                },
                {
                    enabled: true,
                    handler: new L.Draw.Circle(map),
                    title: 'Draw Circle'
                },
                {
                    enabled: true,
                    handler: new L.Draw.Marker(map, {
                      icon: new electricpole,
                      html: '????',
                    }),
                    title: 'Place electric pole marker'
                },                                                                      

            ];
        }
    });

my code show variable electricpole should change icon from into ????.. but i try did not work... can somebody help me how to change it.