when<TResult extends Object?> method

  1. @optionalTypeArgs
TResult when<TResult extends Object?>(
  1. TResult $default(
    1. XrayInt32Range? reset,
    2. @JsonKey.new(name: 'noise') List<NoiseItem>? noiseItems
    )
)

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? reset,
          @JsonKey(name: 'noise') List<NoiseItem>? noiseItems)
      $default,
) {
  final _that = this;
  switch (_that) {
    case _NoiseMask():
      return $default(_that.reset, _that.noiseItems);
    case _:
      throw StateError('Unexpected subclass');
  }
}