protected void convertSubSystemsAndRoot(
      String rootElement, MontiArcStringBuilder builder, boolean instantiate) {
    String simpleName = matlab.doGetSimpleNameLimiterBased(rootElement);

    if (getDeltaOperationForElement(rootElement) == DeltaOperation.REPLACE) {
      simpleName =
          simpleName.substring(
              simpleName.indexOf(DeltaSimulinkKeyWords.REPLACE_WITH)
                  + DeltaSimulinkKeyWords.REPLACE_WITH.length());
    }
    simpleName = simpleName.trim();
    if (instantiate) {
      builder.startCreateInnerComponent(simpleName, simpleName);
    } else {
      builder.startCreateComponent(simpleName);
    }
    convertPorts(rootElement, builder);

    convertSubSystems(rootElement, builder);

    convertModelReferences(rootElement, builder);

    convertSignals(rootElement, builder);

    builder.endCreateInnerComponent();
  }
  public String convertModel(String path, String modelName) {
    if (matlab.isDisconnected()) {
      matlab.connect();
    }

    MontiArcStringBuilder builder = new MontiArcStringBuilder();

    if (matlab.isConnected()) {
      matlab.loadModel(path, modelName);

      builder.addPackage(MontiArcStringBuilder.EXPORT_PACKAGE);

      builder.startCreateComponent(modelName);

      convertPorts(modelName, builder);

      convertModelReferences(modelName, builder);

      convertSubSystems(modelName, builder);

      convertSignals(modelName, builder);

      builder.endCreateComponent();
    } else {
      // TODO handle
    }

    return builder.getConvertedModel();
  }