the class PartitionPrimeNumbers has an error at line 36 and don't compile #16

public static boolean isPrime(List<Integer> primes, Integer candidate) {
    double candidateRoot = Math.sqrt((double) candidate);
    //return takeWhile(primes, i -> i <= candidateRoot).stream().noneMatch(i -> candidate % i == 0);
    return primes.stream().**takeWhile**(i -> i <= candidateRoot).noneMatch(i -> candidate % i == 0);
}