when<TResult extends Object?> method

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

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(XrayInt32Range? rand, XrayInt32Range? randRange,
          String? type, Object? packet, XrayInt32Range? delay)
      $default,
) {
  final _that = this;
  switch (_that) {
    case _NoiseItem():
      return $default(
          _that.rand, _that.randRange, _that.type, _that.packet, _that.delay);
    case _:
      throw StateError('Unexpected subclass');
  }
}