presto-main/src/main/java/io/prestosql/spiller/AesSpillCipher.java/AesSpillCipher/generateNewSecretKey
class AesSpillCipher:    private static SecretKey generateNewSecretKey()
    {
        try {
            KeyGenerator keyGenerator = KeyGenerator.getInstance("AES");
            keyGenerator.init(KEY_BITS);
            return keyGenerator.generateKey();
        }
        catch (NoSuchAlgorithmException e) {
            throw new PrestoException(GENERIC_INTERNAL_ERROR, "Failed to generate new secret key: " + e.getMessage(), e);
        }
    }