src/main/java/org/helm/notation2/parser/notation/HELM2Notation.java
@JsonIgnore
  public GroupingNotation getCurrentGroupingNotation() {
    if (listOfGroupings.size() == 0) {
      return null;
    }
    return listOfGroupings.get(listOfGroupings.size() - 1);
  }
@JsonIgnore
  public GroupingNotation getCurrentGroupingNotation() {
    if (listOfGroupings.size() == 0) {
      return null;
    }
    return listOfGroupings.get(listOfGroupings.size() - 1);
  }
method to get the current grouping notation

@return GroupingNotation