### Question:
Tuple4OfNullablesImpl extends AbstractTupleOfNullables implements Tuple4OfNullables<T0, T1, T2, T3> { @SuppressWarnings("unchecked") @Override public Optional<T3> get3() { return Optional.ofNullable((T3) values[3]); } Tuple4OfNullablesImpl(
            T0 e0,
            T1 e1,
            T2 e2,
            T3 e3); @SuppressWarnings("unchecked") @Override Optional<T0> get0(); @SuppressWarnings("unchecked") @Override Optional<T1> get1(); @SuppressWarnings("unchecked") @Override Optional<T2> get2(); @SuppressWarnings("unchecked") @Override Optional<T3> get3();  }### Answer:
@Test void get3Test() { assertEquals(3, (int) instance.get3().orElseThrow(NoSuchElementException::new)); }