@Nullable
    @Override
    public String valueOf(VcsFileRevision revision) {
      if (revision instanceof VcsFileRevisionEx) {
        if (!Objects.equals(revision.getAuthor(), ((VcsFileRevisionEx)revision).getCommitterName())) {
          return revision.getAuthor() + "*";
        }
      }
      return revision.getAuthor();
    }
@Nullable
    @Override
    public String valueOf(VcsFileRevision revision)