toJson method Null safety

Map<String, dynamic> toJson()

Implementation

Map<String, dynamic> toJson() => {
      'content': List<dynamic>.from(content!.map((x) => x)),
      'code': List<dynamic>.from(code!.map((x) => x)),
      'keys': keys!.toJson(),
      'ledger': ledger!.toJson(),
      'recipients': List<dynamic>.from(recipients!.map((x) => x)),
    };