}

  private static class SetSupplier extends CountingSupplier<Set<Integer>> {
    @Override
    public Set<Integer> getImpl() {
      return new HashSet<>(4);
    }

    @GwtIncompatible @J2ktIncompatible private static final long serialVersionUID = 0;
  }

  public void testNewSetMultimap() {
    CountingSupplier<Set<Integer>> factory = new SetSupplier();