toJson method

Implementation

@override
Map<String, dynamic> toJson() {
  return {
    '@type': 'invoice',
    if (extra != null) '@extra': extra,
    'currency': currency,
    'price_parts': price_parts,
    'max_tip_amount': max_tip_amount,
    'suggested_tip_amounts': suggested_tip_amounts,
    'recurring_payment_terms_of_service_url':
        recurring_payment_terms_of_service_url,
    'terms_of_service_url': terms_of_service_url,
    'is_test': is_test,
    'need_name': need_name,
    'need_phone_number': need_phone_number,
    'need_email_address': need_email_address,
    'need_shipping_address': need_shipping_address,
    'send_phone_number_to_provider': send_phone_number_to_provider,
    'send_email_address_to_provider': send_email_address_to_provider,
    'is_flexible': is_flexible
  };
}