static <A> A cyclicGet(L<A> l, int i) {
  ret empty(l) ? null : get(l, mod(i, l(l)));
}

sbool cyclicGet(BitSet bs, int n, int i) {
  ret bs != null && bs.get(mod(i, n));
}

ifclass LongBuffer
static long cyclicGet(LongBuffer l, int i) {
  ret l.get(mod(i, l.size()));
}
endif