ArcGIS Runtime SDK For Android中CompositeSymbol不支持Render？

https://developers.arcgis.com/android/api-reference/reference/com/esri/core/symbol/CompositeSymbol.html
官方API中这样写的：Composite symbols cannot be used in a renderer and do not form part of the REST specification.
如果CompositeSymbol不支持Render，那么想对FeatureLayer设置CompositeSymbol该用什么方法。