fromJson static method
Creates a object from a json
Implementation
static ChatPhoto fromJson(Map<String, dynamic> json) {
return ChatPhoto(
smallFileId: json['small_file_id']!,
smallFileUniqueId: json['small_file_unique_id']!,
bigFileId: json['big_file_id']!,
bigFileUniqueId: json['big_file_unique_id']!,
);
}