return helper.getIDREF(value);
String svalue = helper.getIDREF(value); if (toDOM) { Node text = document.createTextNode(svalue); currentNode.appendChild(text); handler.recordValues(text, o, f, value); } return svalue;
  protected String getElementIDRefSingleSimple(EObject o, EStructuralFeature f)  {    EObject value = (EObject)helper.getValue(o, f);    return helper.getIDREF(value);  }