@Override
  public String getLineText(int line, Editor editor) {
    if (!isAvailable()) return "";
    final VcsRevisionNumber revisionNumber = myAnnotation.getLineRevisionNumber(line);
    if (revisionNumber != null) {
      final Integer num = myHistoryIds.get(revisionNumber);
      if (num != null) {
        final String size = String.valueOf(myHistoryIds.size());
        String value = num.toString();
        while (value.length() < size.length()) {
          value = " " + value;
        }
        return value;
      }
    }
    return "";
  }
@Override
  public String getLineText(int line, Editor editor)