Photo.fromJson constructor
Parse from a json
Implementation
factory Photo.fromJson(Map<String, dynamic> json) => Photo(
hasStickers: json['has_stickers'],
minithumbnail: json['minithumbnail'] == null ? null : Minithumbnail.fromJson(json['minithumbnail']),
sizes: List<PhotoSize>.from((json['sizes'] ?? []).map((item) => PhotoSize.fromJson(item)).toList()),
);