public class CIMPointCloudReturnFilter : CIMPointCloudFilter, System.ComponentModel.INotifyPropertyChanged, System.Xml.Serialization.IXmlSerializable  

{
  // Note: call within QueuedTask.Run()
  {
    IReadOnlyList<CIMPointCloudFilter> updatedFilter = pointCloudSceneLayer.GetFilters();
    foreach (var f in updatedFilter)
    {
      //There is either 0 or 1 of each
      if (f is CIMPointCloudReturnFilter returnFilter)
      {
        PointCloudFilterDefinition pcfl = PointCloudFilterDefinition.FromCIM(updatedFilter);
        List<PointCloudReturnType> updatedReturnValues = pcfl.ReturnValues;

      }
      if (f is CIMPointCloudValueFilter classCodesFilter)
      {
        // do something
      }

      if (f is CIMPointCloudBitFieldFilter classFlagsFilter)
      {
        // do something
      }
    }
  }
}