Example

// In HTML head, include a link to the BaseLayerPicker.css stylesheet,
// and in the body, include: <div id="baseLayerPickerContainer"
//   style="position:absolute;top:24px;right:24px;width:38px;height:38px;"></div>

 imageryViewModels.push(new bmgl.ProviderViewModel({
     name : 'Earth at Night',
     iconUrl : bmgl.buildModuleUrl('Widgets/Images/ImageryProviders/blackMarble.png'),
     tooltip : 'The lights of cities and villages trace the outlines of civilization \
in this global view of the Earth at night as seen by NASA/NOAA\'s Suomi NPP satellite.',
     creationFunction : function() {
         return new bmgl.BMImageryProvider({ assetId: 3812 });
     }
 }));

 imageryViewModels.push(new bmgl.ProviderViewModel({
     name : 'Natural Earth\u00a0II',
     iconUrl : bmgl.buildModuleUrl('Widgets/Images/ImageryProviders/naturalEarthII.png'),
     tooltip : 'Natural Earth II, darkened for contrast.\nhttp://www.naturalearthdata.com/',
     creationFunction : function() {
         return new bmgl.TileMapServiceImageryProvider({
             url : bmgl.buildModuleUrl('Assets/Textures/NaturalEarthII')
         });
     }
 }));

//Create a BMWidget without imagery, if you haven't already done so.
var BMWidget = new bmgl.BMWidget('container', { imageryProvider: false });

//Finally, create the baseLayerPicker widget using our view models.
var layers = BMWidget.imageryLayers;
var baseLayerPicker = new bmgl.BaseLayerPicker('baseLayerPickerContainer', {
    globe : BMWidget.scene.globe,
    imageryProviderViewModels : imageryViewModels
});