"<p>In this video, we will discover how to add a unique identifier for a class in flutter using the uuid package. This is helpful when dealing with databases or document-based storage.</p> <p> </p> <pre> import 'package:uuid/uuid.dart'; class Task{ String id = Uuid().v1(); String title; bool status; String description; DateTime deadline; Task(this.title,this.status,this.description,this.deadline); Map<String,dynamic> toJson(){ return { "id":id, "title":title, "status":status, "description":description, "deadline":deadline.toIso8601String(), }; } Task.fromJson(Map<String,dynamic> json): id=json['id'], title=json['title'], status=json['status'], description=json['description'], deadline=DateTime.tryParse(json['deadline'])!; }</pre>"