/**
 * A sink that collects all of its inputs into a set.
 *
 * @tsplus static effect/core/stream/Sink.Ops collectAllToSet
 */
export function collectAllToSet<In>(): Sink<never, never, In, never, HashSet<In>> {
  return Sink.foldLeftChunks(HashSet.empty<In>(), (acc, c) => c.reduce(acc, (set, a) => set.add(a)))
}