whenOrNull<TResult extends Object?> method

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

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(@JsonKey(name: 'method') String? cipher, String password,
          int? level, String? email, XrayAddress? address, int? port)?
      $default,
) {
  final _that = this;
  switch (_that) {
    case _ShadowsocksUserConfig() when $default != null:
      return $default(_that.cipher, _that.password, _that.level, _that.email,
          _that.address, _that.port);
    case _:
      return null;
  }
}