Function iterateeCallback

lib/internal/eachOfLimit.js:19–32

(err, value)

        var running = 0;

        function iterateeCallback(err, value) {
            running -= 1;
            if (err) {
                done = true;
                callback(err);
            }
            else if (value === breakLoop || (done && running <= 0)) {
                done = true;
                return callback(null);
            }
            else {
                replenish();
            }
        }

        function replenish () {
            while (running < limit && !done) {