如何在HereMap SDK中使用iOS中的`expudedBuildingsVisible`属性

let mapView = NMAMapView(frame: CGRect(x: 0, y: 0, width: view.bounds.width, height: view.bounds.height))
view.addSubview(mapView)

let mapLoader = NMAPositioningManager.sharedInstance().mapLoader
let mapPackage = mapLoader.getMapPackage("your_map_package_id")

// 为地图设置代理
mapView.delegate = self

// 设置地图视图的中心和缩放级别
let geoCoordinate = NMAGeoCoordinates(latitude: 37.7749, longitude: -122.4194)
mapView.set(geoCenter: geoCoordinate, zoomLevel: 13, animation: .none)

// 添加地图数据源
mapView.mapData.add(mapPackage)

// 设置建筑物的扩展模型可见性
mapView.mapScheme.expudedBuildingsVisible = true

extension ViewController: NMAMapViewDelegate {
    func mapViewDidFinishRenderingMap(_ mapView: NMAMapView, successfully rendered: Bool) {
        if successfullyRendered {
            // 地图渲染完成后的操作
        }
    }
}