OperationPayment constructor
      
      OperationPayment({ 
    
    
- Int64? amount,
 - CurrencyAmount? currencyAmount,
 - String? destination,
 - Int64? destinationTag,
 
Implementation
factory OperationPayment({
  $fixnum.Int64? amount,
  CurrencyAmount? currencyAmount,
  $core.String? destination,
  $fixnum.Int64? destinationTag,
}) {
  final _result = create();
  if (amount != null) {
    _result.amount = amount;
  }
  if (currencyAmount != null) {
    _result.currencyAmount = currencyAmount;
  }
  if (destination != null) {
    _result.destination = destination;
  }
  if (destinationTag != null) {
    _result.destinationTag = destinationTag;
  }
  return _result;
}