class Category { final int id; final String name; final String? slug; final String? description; final int? parent; final int count; final String? imageUrl; Category({ required this.id, required this.name, this.slug, this.description, this.parent, this.count = 0, this.imageUrl, }); factory Category.fromJson(Map json) { return Category( id: json['id'] ?? 0, name: json['name'] ?? '', slug: json['slug'], description: json['description'], parent: json['parent'], count: json['count'] ?? 0, imageUrl: json['image']?['src'], ); } Map toJson() { return { 'id': id, 'name': name, 'slug': slug, 'description': description, 'parent': parent, 'count': count, 'image': imageUrl != null ? {'src': imageUrl} : null, }; } }