@Override
  @Nullable
  public Date getLineDate(int lineNumber) {
    //if (lineNumber >= myLines.size() || lineNumber < 0) {
    //  return null;
    //}
    //lines.get(lineNumber).get(HgAnnotation.FIELD.DATE)
    // todo : parse date
    return null;
  }
@Override
  @Nullable
  public Date getLineDate(int lineNumber)