@Override
  protected Map<String, Integer> performIndexing(IdeaPlugin plugin) {
    Map<String, Integer> result = new HashMap<>();
    indexExtensionPoints(plugin, point -> result.put(point.getEffectiveQualifiedName(), point.getXmlTag().getTextOffset()));
    return result;
  }
@Override
  protected Map<String, Integer> performIndexing(IdeaPlugin plugin)