assertThat(SerializableTester.reserialize(integerFunnel())).isSameInstanceAs(integerFunnel());
    assertThat(SerializableTester.reserialize(longFunnel())).isSameInstanceAs(longFunnel());
    assertThat(SerializableTester.reserialize(unencodedCharsFunnel()))
        .isSameInstanceAs(unencodedCharsFunnel());
    assertEquals(
        sequentialFunnel(integerFunnel()),

   */
  public static Funnel<Integer> integerFunnel() {
    return IntegerFunnel.INSTANCE;
  }

  private enum IntegerFunnel implements Funnel<Integer> {
    INSTANCE;

    @Override
    public void funnel(Integer from, PrimitiveSink into) {
      into.putInt(from);
    }

    @Override
    public String toString() {
      return "Funnels.integerFunnel()";
    }
  }

  /**