}
	prefix := mntPath[:ind]
	return device, prefix, nil
}

func extractIface(mntPath string) (string, bool) {
	reOutput := ifaceRe.FindStringSubmatch(mntPath)
	if len(reOutput) > 1 {
		return reOutput[1], true
	}

	return "", false
}

func extractPortalAndIqn(device string) (string, string, error) {
	ind1 := strings.Index(device, "-")
	if ind1 < 0 {

  if (auto repinput = dyn_cast<TF::TPUReplicatedInputOp>(op)) {
    if (!ValidateReplicatedInput(repinput, num_replicas, tpu_replicate_attr))
      return false;
  }
  if (auto repoutput = dyn_cast<TF::TPUReplicatedOutputOp>(op)) {
    if (!ValidateReplicatedOutput(repoutput, num_replicas, tpu_replicate_attr))
      return false;
  }
  if (auto partinput = dyn_cast<TF::TPUPartitionedInputOp>(op)) {