protected void addFieldReference(
      Form form,
      String formSet,
      ReferencePropertyDefinition definition,
      M2Type contentType,
      WorkflowDefinitionConversion conversion) {
    if (form.isStartForm()) {
      throw new AlfrescoSimpleWorkflowException("Field references cannot be used on start-forms");
    }

    M2Model model = AlfrescoConversionUtil.getContentModel(conversion);

    // Check if model contains an aspect for the property
    String propertyName = getPropertyName(definition, conversion);

    if (model.getAspect(propertyName) == null) {
      throw new AlfrescoSimpleWorkflowException(
          "The property '"
              + definition.getName()
              + "' is not used in a from prior to this form: "
              + contentType.getName()
              + " - "
              + propertyName);
    }

    // Add aspect to content-type
    contentType.getMandatoryAspects().add(propertyName);

    // Add read-only field to form
    form.getFormFieldVisibility().addShowFieldElement(propertyName);

    FormField field = new FormField();
    form.getFormAppearance().addFormAppearanceElement(field);
    field.setId(propertyName);
    field.setLabelId(definition.getName());
    field.setSet(formSet);
    field.setControl(new FormFieldControl(AlfrescoConversionConstants.FORM_READONLY_TEMPLATE));
  }