### Question:
Tuple2OfNullablesMapperImpl extends AbstractTupleMapper<T, Tuple2OfNullables<T0, T1>> implements TupleMapper<T, Tuple2OfNullables<T0, T1>> { public Function<T, T1> get1() { return getAndCast(1); } Tuple2OfNullablesMapperImpl(Function<T, T0> m0, Function<T, T1> m1); @Override Tuple2OfNullables<T0, T1> apply(T t); Function<T, T0> get0(); Function<T, T1> get1();  }### Answer:
@Test void get1() { assertEquals(m1, instance.get1()); }