static <A> A second(L<A> l) {
  return get(l, 1);
}

static <A> A second(Iterable<A> l) {
  if (l == null) null;
  Iterator<A> it = iterator(l);
  if (!it.hasNext()) null;
  it.next();
  ret it.hasNext() ? it.next() : null;
}

static <A> A second(A[] bla) {
  ret bla == null || bla.length <= 1 ? null : bla[1];
}

ifclass Pair
static <A, B> B second(Pair<A, B> p) {
  ret p == null ? null : p.b;
}
endif

ifclass T3
static <A, B, C> B second(T3<A, B, C> t) {
  ret t == null ? null : t.b;
}
endif