How to use the artedi.createCollector function in artedi

var log = options.log;

    // Configure the metric collector.
    var labels = {
        datacenter: options.datacenter,
        server: options.server_uuid,
        zonename: mod_os.hostname(),
        pid: process.pid
    };

    /* service_name includes the shard name in Manta deployments. */
    if (options.service_name) {
        labels.service = options.service_name;
    }

    var collector = mod_artedi.createCollector({
        labels: labels
    });

    var dbopts, dbresolver, dbdomain;
    if (options.standalone) {
        /*
         * Standalone mode takes a Postgres URL to determine what to connect
         * to, which we pass directly to the client. Since this may not be a
         * hostname (i.e., it could a path for using a Unix domain socket),
         * we just provide dummy values here for cueball, and ignore them
         * later on.
         */
        dbopts = options.standalone;
        dbdomain = 'standalone';
        dbresolver = new mod_cueball.StaticIpResolver({
            backends: [

dbresolver.once('added', function (_, primary) {
        var collector = mod_artedi.createCollector({ labels: {} });
        var db = mod_pg.createPool(mod_jsprim.mergeObjects(dbopts.pg, {
            log: LOG,
            domain: 'manatee',
            user: 'postgres',
            collector: collector,
            resolver: dbresolver
        }));

        setupPostgres({
            resolver: dbresolver,
            primary: primary,
            config: config,
            db: db
        }, function (err) {
            db.close();