toJson method Null safety

Map<String, dynamic> toJson()

Implementation

Map<String, dynamic> toJson() => {
      "id": id,
      "name": name,
      "type": type,
      "dimension": dimension,
      "residents": List<dynamic>.from(residents.map((x) => x)),
      "url": url,
      "created": created.toIso8601String(),
    };