Using LabManager SOAP API to get resource usage

I am not seeing anything in the LabManager or vSphere SOAP API (neither the internal nor the external) that can show me the information displayed in the Resource Usage screen in LabManager 4.0.

Specifically I'm looking for the info under the headings:

Resource Pool Organizations CPU Used CPU Reservations (Used/Total) Memory Used Memory Reservations (Used/Total)

Can someone help me out here?

Thanks.