/** * Lazily Map 2nd element and memoise the result * * @param fn Map function * @return */ default <T> PTuple8<T1, T, T3, T4, T5, T6, T7, T8> lazyMap2(Function<T2, T> fn) { if (arity() != 8) return (PTuple8) PTuple7.super.lazyMap2(fn); return new LazyMap2PTuple8(fn, (PTuple8) this); }