code: public EList<RuleElement> getElements()
    {
      if (elements == null)
      {
        elements = new EObjectContainmentEList<RuleElement>(RuleElement.class, this, SimpleAntlrPackage.GROUP__ELEMENTS);
      }
      return elements;
    }
docs: <!-- begin-user-doc -->
  <!-- end-user-doc -->
  @generated