Cesium dataSources添加和删除

//添加      
var addData = Cesium.KmlDataSource.load(tilesetUrl.url, options);
addData.then(function (dataSource) {
    viewer.dataSources.add(dataSource);
    viewer.zoomTo(dataSource);//定位到该dataSource
    window.dataArray.push({
          id: data.id,
           data: dataSource,
    });
});
//删除
for (let i = 0; i < indexarr.length; i++) { 
    viewer.dataSources.remove(indexarr[i].data, true);
  }