I am using Autodesk forge viewer for loading ifc model.
In the model tree iam getting the model hierarchy.Iam not able to see spaces and Zones in the model tree,but iam getting Ifc spaces.
iam using the below version

    <script src="https://developer.api.autodesk.com/modelderivative/v2/viewers/7.*/viewer3D.min.js"></script>

I want to get Zones and spaces of the loaded ifc model.please help me how to get that

Thanks in advance.