code: func resourceVSphereStorageDrsVMOverrideFlattenID(pod *object.StoragePod, vm *object.VirtualMachine) (string, error) {
  	podID := pod.Reference().Value
  	props, err := virtualmachine.Properties(vm)
  	if err != nil {
  		return "", fmt.Errorf("cannot compute ID off of properties of virtual machine: %s", err)
  	}
  	vmID := props.Config.Uuid
  	return strings.Join([]string{podID, vmID}, ":"), nil
  }
docs: // resourceVSphereStorageDrsVMOverrideFlattenID makes an ID for the
  // vsphere_storage_drs_vm_override resource.