backup. before shop update

lib/models/extra_fee.dart

@@ -0,0 +1,31 @@
+
+
+import 'dart:convert';
+
+class ExtraFee {
+  int id;
+  String name;
+  String description;
+  double rate;
+  double price;
+
+  ExtraFee.fromJson(Map<String, dynamic> json)
+    : id = json['id'],
+      name = json['name'],
+      description = json['description'],
+      rate = double.parse(json['rate'].toString()),
+      price = double.parse(json['price'].toString());
+
+  Map<String, dynamic> toJson() => {
+    'id': id,
+    'name': name,
+    'description': description,
+    'rate': rate,
+    'price': price,
+  };
+
+  @override
+  String toString() {
+    return json.encode(this);
+  }
+}