when<TResult extends Object?> method

  1. @optionalTypeArgs
TResult when<TResult extends Object?>(
  1. TResult $default(
    1. String? packets,
    2. XrayInt32Range? length,
    3. XrayInt32Range? delay,
    4. List<XrayInt32Range>? lengths,
    5. List<XrayInt32Range>? delays,
    6. XrayInt32Range? maxSplit,
    )
)

A switch-like method, using callbacks.

As opposed to map, this offers destructuring. It is equivalent to doing:

switch (sealedClass) {
  case Subclass(:final field):
    return ...;
  case Subclass2(:final field2):
    return ...;
}

Implementation

@optionalTypeArgs
TResult when<TResult extends Object?>(
  TResult Function(
          String? packets,
          XrayInt32Range? length,
          XrayInt32Range? delay,
          List<XrayInt32Range>? lengths,
          List<XrayInt32Range>? delays,
          XrayInt32Range? maxSplit)
      $default,
) {
  final _that = this;
  switch (_that) {
    case _FragmentMask():
      return $default(_that.packets, _that.length, _that.delay, _that.lengths,
          _that.delays, _that.maxSplit);
    case _:
      throw StateError('Unexpected subclass');
  }
}