static O evalWithTimeoutOrNull(int timeoutMS, fO f) {
  ret eitherA(evalWithTimeout(timeoutMS, f));
}

static O evalWithTimeoutOrNull(double timeoutSeconds, fO f) {
  ret eitherA(evalWithTimeout(timeoutSeconds, f));
}

static <A> A evalWithTimeoutOrNull(int timeoutMS, F0<A> f) {
  ret (A) eitherA(evalWithTimeout(timeoutMS, f));
}

static <A> A evalWithTimeoutOrNull(double timeoutSeconds, F0<A> f) {
  ret (A) eitherA(evalWithTimeout(timeoutSeconds, f));
}