Dart APIunself_modelAccounttoJson toJson method Null safety Map<String, dynamic> toJson() inherited Implementation Map<String, dynamic> toJson() => throw _privateConstructorUsedError; unself_model unself_model Account toJson method Account class Constructors Account fromJson Properties appId archiveId copyWith created emails extra hashCode id isOwner labels name runtimeType updated Methods noSuchMethod toJson toString Operators operator ==