@Nullable
  protected @Nls String getStatusTextMessage() {
    if (myTextDiffProvider.isHighlightingDisabled()) {
      return DiffBundle.message("diff.highlighting.disabled.text");
    }
    List<SimpleDiffChange> allChanges = myModel.getAllChanges();
    return DiffUtil.getStatusText(allChanges.size(),
                                  ContainerUtil.count(allChanges, it -> it.isExcluded()),
                                  myModel.isContentsEqual());
  }
@Nullable
  protected @Nls String getStatusTextMessage()