public List<StdArrangementMatchRule> getRuleSequences() {
    final List<StdArrangementMatchRule> rulesSequences = new ArrayList<>();
    for (int i = 0; i < getModel().getSize(); i++) {
      Object element = getModel().getElementAt(i);
      if (element instanceof StdArrangementMatchRule) {
        rulesSequences.add((StdArrangementMatchRule)element);
      }
    }
    return rulesSequences;
  }
public List<StdArrangementMatchRule> getRuleSequences()