static int gSearchNeqIdx(O predicate) {
  ret gSearchNeqIdx(predicate, 1); // no sense to start from 0
}

static int gSearchNeqIdx(final O predicate, int startIdx) {
  ret gSearchIdx(func(S s) {
    neq(s, gI()) && isTrue(callF(predicate, s))
  }, startIdx);
}