PiliPlus/lib/models_new/pgc/pgc_info_model/brief.dart

class Brief {
  List<Img>? img;

  Brief({
    this.img,
  });

  factory Brief.fromJson(Map<String, dynamic> json) => Brief(
    img: (json['img'] as List?)?.map((e) => Img.fromJson(e)).toList(),
  );
}

class Img {
  num? aspectRatio;
  String? url;

  Img({
    this.aspectRatio,
    this.url,
  });

  factory Img.fromJson(Map<String, dynamic> json) => Img(
    aspectRatio: json['aspect_ratio'],
    url: json['url'] as String?,
  );
}