static LL mapLike levelTwoMap(F1 f, Iterable> l) { ret mapTwoLevelsDown(f, l); } static LL mapLike levelTwoMap(O f, Iterable> l) { ret mapTwoLevelsDown(f, l); } static LL mapLike levelTwoMap(Iterable> l, F1 f) { ret levelTwoMap(f, l); }