import 'package:json_annotation/json_annotation.dart'; part 'private_key_info.g.dart'; @JsonSerializable() class PrivateKeyInfo { final String id; @JsonKey(name: 'private_key') final String key; const PrivateKeyInfo({required this.id, required this.key}); factory PrivateKeyInfo.fromJson(Map json) => _$PrivateKeyInfoFromJson(json); Map toJson() => _$PrivateKeyInfoToJson(this); String? get type { final lines = key.split('\n'); if (lines.length < 2) { return null; } final firstLine = lines[0]; final splited = firstLine.split(RegExp(r'\s+')); if (splited.length < 2) { return null; } return splited[1]; } }