StringBuffer result = new StringBuffer();
buffer.setLength(0); StringBuffer result = buffer;
  protected String getElementIDRefManySimple(EObject o, EStructuralFeature f)  {    InternalEList values = (InternalEList)helper.getValue(o, f);    StringBuffer result = new StringBuffer();    for (int i = 0, size = values.size(); i < size; i++)    {      result.append(helper.getIDREF((EObject)values.basicGet(i)));      result.append(' ');    }    return result.substring(0, result.length() - 1);  }