save before flutter upgrade

lib/models/customers/payment.dart

@@ -0,0 +1,44 @@
+import 'dart:convert';
+
+class Payment {
+  Payment({
+    required this.paymentId,
+    required this.transactionId,
+    required this.date,
+    required this.method,
+    required this.description,
+    required this.status,
+    required this.amount,
+    required this.error,
+  });
+
+  int transactionId;
+  int paymentId;
+  DateTime date;
+  String method;
+  String description;
+  String status;
+  num amount;
+  String error;
+
+  // String get displayValue => creditCard == '-' ? creditCard : '****$last4Digits';
+
+  // String get last4Digits => creditCard.substring(creditCard.length - 4);
+
+  factory Payment.fromJson(String str) => Payment.fromMap(json.decode(str));
+
+  factory Payment.fromMap(Map<String, dynamic> json) {
+    Payment payment = Payment(
+      paymentId: json['payment_id'],
+      transactionId: json['transaction_id'],
+      date: DateTime.parse(json["date"]),
+      method: json['method'],
+      description: json['description'],
+      status: json['status'],
+      amount: json['amount'],
+      error: json['error'] ?? '',
+    );
+
+    return payment;
+  }
+}