@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);
  }
@ 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
method to get the current grouping notation