whenOrNull<TResult extends Object?> method

@optionalTypeArgs TResult? whenOrNull<TResult extends Object?>(TResult? $default(XrayAddress? address, int? port, int? level, String? email, @JsonKey.new(name: 'method') String? cipher, String? password, bool? uot, int? uotVersion, List<ShadowsocksServerTarget>? servers,)?)

A variant of when that fallback to returning null

It is equivalent to doing:

switch (sealedClass) {
  case Subclass(:final field):
    return ...;
  case _:
    return null;
}

Implementation

@optionalTypeArgs
TResult? whenOrNull<TResult extends Object?>(
  TResult? Function(
          XrayAddress? address,
          int? port,
          int? level,
          String? email,
          @JsonKey(name: 'method') String? cipher,
          String? password,
          bool? uot,
          int? uotVersion,
          List<ShadowsocksServerTarget>? servers)?
      $default,
) {
  final _that = this;
  switch (_that) {
    case _ShadowsocksClientConfig() when $default != null:
      return $default(
          _that.address,
          _that.port,
          _that.level,
          _that.email,
          _that.cipher,
          _that.password,
          _that.uot,
          _that.uotVersion,
          _that.servers);
    case _:
      return null;
  }
}