this.apiHost = "https://api.mapbox.cn";
url: 'mapbox://styles/mapbox/dark-v9',
icon: `${this.apiHost}/styles/v1/mapbox/dark-v9/static/-122.3391,37.7922,9.19,0,0/400x300?access_token=${this.token}&logo=false&attribution=false`,
layerGroups: [] // DEFAULT_LAYER_GROUPS
label: 'Light Streets 9',
url: 'mapbox://styles/mapbox/light-v9',
icon: `${this.apiHost}/styles/v1/mapbox/light-v9/static/-122.3391,37.7922,9.19,0,0/400x300?access_token=${this.token}&logo=false&attribution=false`,
layerGroups: [] // DEFAULT_LAYER_GROUPS