public enum SceneLayerDataSourceType : System.Enum, System.IComparable, System.IConvertible, System.IFormattable, System.ISpanFormattable  

{
  // Note: call within QueuedTask.Run()
  {
    var dataSourceType = featSceneLayer?.GetDataSourceType() ??
                             SceneLayerDataSourceType.Unknown;
    if (dataSourceType == SceneLayerDataSourceType.SLPK)
    {
      //Uses SLPK - only cached attributes
    }
    else if (dataSourceType == SceneLayerDataSourceType.Service)
    {
      //Hosted service - can have live attributes - check HasAssociatedFeatureService
    }
  }
}

{
  SceneLayerDataSourceType dataSourceType = pointCloudSceneLayer.GetDataSourceType();
  if (dataSourceType == SceneLayerDataSourceType.Service)
  {
    //TODO...
  }
  else if (dataSourceType == SceneLayerDataSourceType.SLPK)
  {

  }
}