How to use the getdns.DNSSEC_SECURE function in getdns

const getFirstSecureResponse = (result, type) => {
    const repliesTree = result.replies_tree;
    // Validate that there is a reply with an answer.
    if (!repliesTree || !repliesTree.length
        || !repliesTree[0].answer
        || !repliesTree[0].answer.length) {
        return "empty answer list for type " + type;
    }
    const reply = repliesTree[0];

    // Ensure the reply is secure.
    if (reply.dnssec_status !== getdns.DNSSEC_SECURE) {
        return "insecure reply for type " + type;
    }
    let answers = reply.answer;

    // Get the records of that type.
    answers = answers.filter((answer) => {
        return answer.type === type;
    });
    if (!answers.length) {
        return "no answers of type " + type;
    }
    return answers[0];
};

const dnssecSecureReplies = replies.filter(function(reply) {
            return reply.dnssec_status === getdns.DNSSEC_SECURE;
        });