@Nullable
  private Range<Integer> getRangeForContributor(SearchEverywhereContributor<?> contributor) {
    List<SearchEverywhereContributor> contributorsList = contributors();
    int first = contributorsList.indexOf(contributor);
    if (first < 0) return null;
    int last = contributorsList.lastIndexOf(contributor);
    if (isMoreElement(last)) {
      last -= 1;
    }

    return new Range<>(first, last);
  }
@Nullable
  private Range<Integer> getRangeForContributor(SearchEverywhereContributor<?> contributor)