@Override
  public int hashCode() {
    int result = myMajor;
    result = 31 * result + myMinor;
    result = 31 * result + myPatch;
    if (myPreRelease != null) {
      result = 31 * result + myPreRelease.hashCode();
    }
    return result;
  }
@Override
  public int hashCode()