code: public long lookupVmOverheadMemory(VirtualMachine vm, HostSystem host) throws InvalidArgument, InvalidType, ManagedObjectNotFound, NotFound, RuntimeFault, RemoteException {
          return getVimService().lookupVmOverheadMemory(getMOR(), vm.getMOR(), host.getMOR());
      }
docs: Return static VM overhead memory value in bytes for a (vm, host) pair from the overhead memory module (OMM)
  in Virtual Center.
  
  @param vm   The Virtual Machine
  @param host The Host
  @return Overhead memory value, if found in the OMM.
  @throws InvalidArgument
  @throws InvalidType
  @throws ManagedObjectNotFound
  @throws NotFound
  @throws RuntimeFault
  @throws RemoteException