whenOrNull<TResult extends Object?> method

@optionalTypeArgs TResult? whenOrNull<TResult extends Object?>(TResult? $default(XrayInt32Range? rand, XrayInt32Range? randRange, String? type, Object? packet, XrayInt32Range? delay,)?)

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(XrayInt32Range? rand, XrayInt32Range? randRange,
          String? type, Object? packet, XrayInt32Range? delay)?
      $default,
) {
  final _that = this;
  switch (_that) {
    case _NoiseItem() when $default != null:
      return $default(
          _that.rand, _that.randRange, _that.type, _that.packet, _that.delay);
    case _:
      return null;
  }
}