@NotNull
    protected SimpleDiffRequest createRequest() {
      List<DiffContent> contents = myRequest.getContents();
      List<String> titles = myRequest.getContentTitles();
      return new SimpleDiffRequest(myRequest.getTitle(),
                                   mySide1.select(contents), mySide2.select(contents),
                                   mySide1.select(titles), mySide2.select(titles));
    }
@NotNull
    protected SimpleDiffRequest createRequest()