public void isInOrder() {
    isInOrder(Ordering.natural());
  }
@Test
  public void iterableIsInOrder() {
    assertThat(asList()).isInOrder();
    assertThat(asList(1)).isInOrder();
    assertThat(asList(1, 1, 2, 3, 3, 3, 4)).isInOrder();
  }