save before flutter upgrade

lib/models/customers/messages.dart

@@ -0,0 +1,26 @@
+import 'dart:convert';
+
+class Message {
+  Message({
+    required this.messageId,
+    required this.createdAt,
+    required this.customerFk,
+    required this.text,
+  });
+
+  int messageId;
+  DateTime createdAt;
+  int customerFk;
+  String text;
+
+  factory Message.fromJson(String str) => Message.fromMap(json.decode(str));
+
+  factory Message.fromMap(Map<String, dynamic> json) {
+    return Message(
+      messageId: json["notification_id"],
+      createdAt: DateTime.parse(json["created_at"]),
+      customerFk: json['from'],
+      text: json['message'] ?? '',
+    );
+  }
+}