如果我使用SymbolManager显示我的图标，如何在android的mapbox中添加集群？

SymbolManager symbolManager = new SymbolManager(mapView, mapboxMap);
symbolManager.setIconAllowOverlap(true);
symbolManager.setTextAllowOverlap(true);

SymbolOptions symbolOptions = new SymbolOptions()
    .withLatLng(new LatLng(latitude, longitude))
    .withIconImage(iconImage)
    .withIconSize(1.0f);

symbolManager.create(symbolOptions);

ClusterManager<MyClusterItem> clusterManager = new ClusterManager<>(context, mapView, mapboxMap);

public class MyClusterItem implements ClusterItem {
    private LatLng position;

    public MyClusterItem(double latitude, double longitude) {
        position = new LatLng(latitude, longitude);
    }

    @Override
    public LatLng getPosition() {
        return position;
    }
}

ClusterOptions clusterOptions = new ClusterOptions()
    .withClusterSize(50)
    .withClusterIconDrawable(ContextCompat.getDrawable(context, R.drawable.cluster_icon));

clusterManager.setRenderer(new DefaultClusterRenderer<MyClusterItem>(context, mapView, clusterManager));

MyClusterItem clusterItem = new MyClusterItem(latitude, longitude);
clusterManager.addItem(clusterItem);

clusterManager.cluster();