save before flutter upgrade

lib/models/state.dart

@@ -0,0 +1,23 @@
+import 'dart:convert';
+
+class StateAPI {
+  StateAPI({
+    required this.id,
+    required this.code,
+    required this.name,
+  });
+
+  int id;
+  String code;
+  String name;
+
+  factory StateAPI.fromJson(String str) => StateAPI.fromMap(json.decode(str));
+
+  factory StateAPI.fromMap(Map<String, dynamic> json) {
+    return StateAPI(
+      id: json["state_id"],
+      code: json['code'],
+      name: json['name'],
+    );
+  }
+}