@Nullable
  protected @Nls String getStatusTextMessage() {
    ChangedBlockData blockData = myModel.getData();
    if (blockData == null) return null;

    List<UnifiedDiffChange> allChanges = blockData.getDiffChanges();
    return DiffUtil.getStatusText(allChanges.size(),
                                  ContainerUtil.count(allChanges, it -> it.isExcluded()),
                                  myModel.isContentsEqual());
  }
@Nullable
  protected @Nls String getStatusTextMessage()