code: function LeafletDataSourceDisplay(options) {
    //>>includeStart('debug', pragmas.debug);
    Check.typeOf.object("options", options);
    Check.typeOf.object("options.scene", options.scene);
    Check.typeOf.object(
      "options.dataSourceCollection",
      options.dataSourceCollection
    );
    //>>includeEnd('debug');
  
    this._displayID = createGuid();
  
    var scene = options.scene;
    var dataSourceCollection = options.dataSourceCollection;
  
    this._eventHelper = new EventHelper();
    this._eventHelper.add(
      dataSourceCollection.dataSourceAdded,
      this._onDataSourceAdded,
      this
    );
    this._eventHelper.add(
      dataSourceCollection.dataSourceRemoved,
      this._onDataSourceRemoved,
      this
    );
    this._eventHelper.add(
      dataSourceCollection.dataSourceMoved,
      this._onDataSourceMoved,
      this
    );
  
    this._dataSourceCollection = dataSourceCollection;
    this._scene = scene;
    this._visualizersCallback = defaultValue(
      options.visualizersCallback,
      LeafletDataSourceDisplay.defaultVisualizersCallback
    );
  
    for (var i = 0, len = dataSourceCollection.length; i < len; i++) {
      this._onDataSourceAdded(dataSourceCollection, dataSourceCollection.get(i));
    }
  
    var defaultDataSource = new CustomDataSource();
    this._onDataSourceAdded(undefined, defaultDataSource);
    this._defaultDataSource = defaultDataSource;
  
    this._ready = false;
    this._lastTime = JulianDate.now();
  }
docs: Visualizes a collection of {@link DataSource} instances in Leaflet.
  @alias LeafletDataSourceDisplay
  @constructor
  
  @param {Object} options Object with the following properties:
  @param {Scene} options.scene The scene in which to display the data.
  @param {DataSourceCollection} options.dataSourceCollection The data sources to display.
  @param {LeafletDataSourceDisplay~VisualizersCallback} [options.visualizersCallback=LeafletDataSourceDisplay.defaultVisualizersCallback]
  A function which creates an array of visualizers used for visualization.
  If undefined, all standard visualizers are used.