@Override
  public void replaceClassName(final DClassElement oldClassElement, String newClassName) {
    if (oldClassElement == null) return;

    final DRootElement rootElement = getRootElement();
    rootElement.removeClassElement(oldClassElement.getName());

    oldClassElement.setName(newClassName);
    rootElement.mergeAddClass(oldClassElement);

    fireChange();
  }
@Override
  public void replaceClassName(final DClassElement oldClassElement, String newClassName)