版本：
文件：
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https://cdn.bootcdn.net/ajax/libs/leaflet-groupedlayercontrol/0.6.1/leaflet.groupedlayercontrol.css
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https://cdn.bootcdn.net/ajax/libs/leaflet-groupedlayercontrol/0.6.1/leaflet.groupedlayercontrol.js
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https://cdn.bootcdn.net/ajax/libs/leaflet-groupedlayercontrol/0.6.1/leaflet.groupedlayercontrol.min.css
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https://cdn.bootcdn.net/ajax/libs/leaflet-groupedlayercontrol/0.6.1/leaflet.groupedlayercontrol.min.js
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https://cdn.bootcdn.net/ajax/libs/leaflet-groupedlayercontrol/0.6.1/leaflet.groupedlayercontrol.min.js.map