@Override
  public void writeExternal(@NotNull Element element) {
    final String targetName = getTargetName();
    if (targetName == null) {
      return;
    }
    element.setAttribute(FILTER_TARGET_NAME, targetName);
    element.setAttribute(FILTER_IS_VISIBLE, Boolean.valueOf(isVisible()).toString());
  }
@Override
  public void writeExternal(@NotNull Element element)