encode<V>  static method 
Implementation
static V encode<V>(
  PromotionCodeCurrencyOptionsValue instance,
  Encoder<V> encoder,
) {
  final container = encoder.container<String>();
  if (instance.minimumAmount != null) {
    container.encodeInt(
      'minimum_amount',
      instance.minimumAmount!,
    );
  }
  return container.value;
}