message: Make `Multiple` public
diff: @@ -132,7 +132,7 @@ pub type Effects<Ev> = Multiple<Effect<Ev>>;
  /// size of two items is chosen because one item is the most common use case, and large items are
  /// typically boxed. In the latter case two pointers and one enum variant discriminator is almost
  /// the same size as an empty vec, which is two pointers.
  -type Multiple<T> = SmallVec<[T; 2]>;
  +pub type Multiple<T> = SmallVec<[T; 2]>;
  /// A responder satisfying a request.
  #[must_use]
  