Stick to ES5.
Stick to ES5.

likangning93/cesium,CesiumGS/cesium,likangning93/cesium,likangning93/cesium,AnalyticalGraphicsInc/cesium,progsung/cesium,progsung/cesium,CesiumGS/cesium,CesiumGS/cesium,AnalyticalGraphicsInc/cesium,CesiumGS/cesium,likangning93/cesium,YonatanKra/cesium,YonatanKra/cesium,YonatanKra/cesium,YonatanKra/cesium,CesiumGS/cesium,likangning93/cesium