public DoubleArrayAsIterable usingExactEquality() {
    return new DoubleArrayAsIterable(EXACT_EQUALITY_CORRESPONDENCE, iterableSubject());
  }
@Test
  public void usingExactEquality_contains_success() {
    assertThat(array(1.1, 2.2, 3.3)).usingExactEquality().contains(2.2);
  }