setTransactionRefId method
Sets the transaction reference ID for the UPI transaction.
Implementation
void setTransactionRefId(String? transactionRefId) {
  _upi.transactionRefId = transactionRefId;
}Sets the transaction reference ID for the UPI transaction.
void setTransactionRefId(String? transactionRefId) {
  _upi.transactionRefId = transactionRefId;
}