backup. before shop update

lib/models/shipping_rate.dart

@@ -0,0 +1,73 @@
+
+import 'dart:convert';
+
+import 'package:flutter/foundation.dart';
+
+class ShippingRate {
+  String name;
+  double price;
+  List<Rate> rates;
+
+  ShippingRate.fromJson(Map<String, dynamic> json)
+    : name = json['name'],
+      price = double.parse(json['price'].toString()),
+      rates = (json['rates'] as List).map((e) => Rate.fromJson(e)).toList();
+
+  Map<String, dynamic> toJson() => {
+    'name': name,
+    'price': price,
+    'rates': rates,
+  };
+
+  @override
+  bool operator ==(Object other) =>
+      identical(this, other) ||
+          other is ShippingRate &&
+          runtimeType == other.runtimeType &&
+          name == other.name &&
+          price.toStringAsFixed(2) == other.price.toStringAsFixed(2) &&
+          listEquals(rates, other.rates);
+
+  @override
+  String toString() {
+    return json.encode(this);
+  }
+
+  @override
+  int get hashCode =>
+      name.hashCode ^
+      price.hashCode ^
+      rates.hashCode;
+}
+
+class Rate {
+  String name;
+  double rate;
+
+  Rate.fromJson(Map<String, dynamic> json)
+    : name = json['name'],
+      rate = double.parse(json['rate'].toString());
+
+  Map<String, dynamic> toJson() => {
+    'name': name,
+    'rate': rate,
+  };
+
+  @override
+  bool operator ==(Object other) =>
+      identical(this, other) ||
+          other is Rate &&
+          runtimeType == other.runtimeType &&
+          name == other.name &&
+          rate.toStringAsFixed(2) == other.rate.toStringAsFixed(2);
+
+  @override
+  String toString() {
+    return json.encode(this);
+  }
+
+  @override
+  int get hashCode =>
+      name.hashCode ^
+      rate.hashCode;
+}