// class TransactionListResponse {
//   String? error;
//   String? balanceAmount;
//   String? balanceType;
//   String? totalCredit;
//   String? totalDebit;
//   Map<String, List<TransactionItem>>? transactions;
//   String? message;
//
//   TransactionListResponse({
//     this.error,
//     this.balanceAmount,
//     this.balanceType,
//     this.totalCredit,
//     this.totalDebit,
//     this.transactions,
//     this.message,
//   });
//
//   TransactionListResponse.fromJson(Map<String, dynamic> json) {
//     error = json['error'];
//     balanceAmount = json['balance_amount'];
//     balanceType = json['balance_type'];
//     totalCredit = json['total_credit'];
//     totalDebit = json['total_debit'];
//     message = json['message'];
//
//     if (json['transactions'] != null) {
//       transactions = {};
//       json['transactions'].forEach((key, value) {
//         transactions![key] = List<TransactionItem>.from(
//           value.map((v) => TransactionItem.fromJson(v)),
//         );
//       });
//     }
//   }
//
//   Map<String, dynamic> toJson() {
//     final data = <String, dynamic>{};
//     data['error'] = error;
//     data['balance_amount'] = balanceAmount;
//     data['balance_type'] = balanceType;
//     data['total_credit'] = totalCredit;
//     data['total_debit'] = totalDebit;
//     data['message'] = message;
//     if (transactions != null) {
//       data['transactions'] = transactions!.map((key, value) =>
//           MapEntry(key, value.map((v) => v.toJson()).toList()));
//     }
//     return data;
//   }
// }
//
// class TransactionItem {
//   String? id;
//   String? billId;
//   String? atype;
//   String? type;
//   String? datetime;
//   String? cAmount;
//   String? dAmount;
//   String? narration;
//
//   TransactionItem({
//     this.id,
//     this.billId,
//     this.atype,
//     this.type,
//     this.datetime,
//     this.cAmount,
//     this.dAmount,
//     this.narration,
//   });
//
//   TransactionItem.fromJson(Map<String, dynamic> json) {
//     id = json['id'];
//     billId = json['bill_id'];
//     atype = json['atype'];
//     type = json['type'];
//     datetime = json['datetime'];
//     cAmount = json['c_amount'];
//     dAmount = json['d_amount'];
//     narration = json['narration'];
//   }
//
//   Map<String, dynamic> toJson() => {
//     'id': id,
//     'bill_id': billId,
//     'atype': atype,
//     'type': type,
//     'datetime': datetime,
//     'c_amount': cAmount,
//     'd_amount': dAmount,
//     'narration': narration,
//   };
// }