}

  @SuppressWarnings("OptionalOfRedundantMethod") // Unit tests for Optional
  public void testOr_t_present() {
    assertEquals("a", Optional.of("a").or("default"));
  }

  public void testOr_t_absent() {
    assertEquals("default", Optional.absent().or("default"));
  }

  @SuppressWarnings("OptionalOfRedundantMethod") // Unit tests for Optional
  public void testOr_supplier_present() {