code: private <T extends URNIdentified> Stream<T> sortStreamLexicographically(Stream<T> inputStream) {
      Spliterator<T> spliterator = inputStream.spliterator();
      if (spliterator.hasCharacteristics(Spliterator.SORTED) && spliterator.getComparator()
          .equals(this.lexicographicalComparator)) {
        return StreamSupport.stream(spliterator, false);
      }
      return StreamSupport.stream(spliterator, false).sorted(this.lexicographicalComparator);
    }
docs: Sort input stream lexicographically. Noop if the input stream is already sorted.