src/main/java/org/helm/notation2/parser/notation/HELM2Notation.java
public String annotationToHELM2() {
    if (!(annotationSection.isEmpty())) {
      StringBuilder sb = new StringBuilder();
      for (int i = 0; i < annotationSection.size(); i++) {
        sb.append(annotationSection.get(i).toHELM2() + "|");
      }

      sb.setLength(sb.length() - 1);
      return sb.toString();
    }
    return "";
  }
public String annotationToHELM2() {
    if (!(annotationSection.isEmpty())) {
      StringBuilder sb = new StringBuilder();
      for (int i = 0; i < annotationSection.size(); i++) {
        sb.append(annotationSection.get(i).toHELM2() + "|");
      }

      sb.setLength(sb.length() - 1);
      return sb.toString();
    }
    return "";
  }
method to generate a valid HELM2 string for the fourth section

@return valid HELM2 String