when<TResult extends Object?> method

@optionalTypeArgs TResult when<TResult extends Object?>(TResult $default(String photoAlbumMenuText, String goShootText))

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(
          @JsonKey(name: 'photoAlbumMenuText') String photoAlbumMenuText,
          String goShootText)
      $default,
) {
  final _that = this;
  switch (_that) {
    case _PictureSelectionI18nConfig():
      return $default(_that.photoAlbumMenuText, _that.goShootText);
  }
}