class SwaptionSurfaceExpiryStrikeParameterMetadata implements ParameterMetadata, ImmutableBean, Serializable {

  public static SwaptionSurfaceExpiryStrikeParameterMetadata of(
      double yearFraction,
      double strike) {

    String label = Pair.of(yearFraction, strike).toString();
    return new SwaptionSurfaceExpiryStrikeParameterMetadata(yearFraction, strike, label);
  }

  private  SwaptionSurfaceExpiryStrikeParameterMetadata(
      double yearFraction,
      double strike,
      String label);

}