save before flutter upgrade

lib/models/customers/customer_subscriptions.dart

@@ -0,0 +1,47 @@
+import 'dart:convert';
+
+class CustomerSubscription {
+  int subscriptionId;
+  String description;
+  double amount;
+  String status;
+  String createdAt;
+  String periodStart;
+  String? periodEnd;
+
+  CustomerSubscription({
+    required this.subscriptionId,
+    required this.description,
+    required this.amount,
+    required this.status,
+    required this.createdAt,
+    required this.periodStart,
+    required this.periodEnd,
+  });
+
+  factory CustomerSubscription.fromJson(String str) =>
+      CustomerSubscription.fromMap(json.decode(str));
+
+  String toJson() => json.encode(toMap());
+
+  factory CustomerSubscription.fromMap(Map<String, dynamic> json) =>
+      CustomerSubscription(
+        subscriptionId: json["subscription_id"],
+        description: json["description"],
+        amount: json["amount"],
+        status: json["status"],
+        createdAt: json["created_at"],
+        periodStart: json["period_start"],
+        periodEnd: json["period_end"],
+      );
+
+  Map<String, dynamic> toMap() => {
+        "subscription_id": subscriptionId,
+        "description": description,
+        "amount": amount,
+        "status": status,
+        "created_at": createdAt,
+        "period_start": periodStart,
+        "period_end": periodEnd,
+      };
+}