delay = (delay === undefined) ? 0 : delay;

            if (!$el) {

            if (!$el) { // DOM node does not exists -> nothing to animate; create + place

            } else {

            } else { // DOM node does exists -> animate

                delay = delay || 500;

                    // Another check (in the timeout delay things may have changed.)
                    if ($(key) && $(key).parentNode.id == target_id) return;

        placeTokens: function (tokens, target_id, delay) {

        placeTokens: function (tokens, target_id, delay, duration) {
            duration = (duration === undefined) ? 1000 : duration; // max total duration for all tokens

            delay = Math.min(delay, duration / tokens.length);