Classes

MUST extend all classes with equatable

Equatable is designed to only work with immutable objects so all member variables must be final.

info

```dart{1,3,15,16} title="1. model having the variables and constructor for the list of movies"
import 'package:equatable/equatable.dart';

class MovieModel extends Equatable {
  String movieId;
  String movieName;
  bool isFavorite;
  String posterUrl;

  MovieModel( {required this.movieId, required this.movieName, required this.posterUrl, this.isFavorite = false} );

  void toggleFavorite() {
    isFavorite = !isFavorite;
  }

  @override
  List<Object?> get props => [movieId, movieName, isFavorite, posterUrl];   // returns a `List<dynamic>` containing all the 'final' variables of this class
}

---

creating objects of class

if 'Constructor' NOT is written for the class

Rectangle obj = Rectangle();

if 'Constructor' IS WRITTEN for the class

class Rectangle {
  var width = 10;
  var height = 2;

  Rectangle({required this.width, required this.height}); // Constructor with Named Parameters
}

void main() {
  Rectangle hell = Rectangle(height: 9, width: 8);  // creating object `obj` for the class `Rectangle`
}