public void testGetNext_withDefault_empty_null() {
    Iterator<String> iterator = emptyIterator();
    assertThat(Iterators.<@Nullable String>getNext(iterator, null)).isNull();
  }

  public void testGetNext_withDefault_two() {
    Iterator<String> iterator = asList("foo", "bar").iterator();
    assertEquals("foo", Iterators.getNext(iterator, "x"));
  }

  public void testGetLast_basic() {