callback = function(child){
            var data = child.getUserObject();

            if(data) {
                var actionTag = data.getActionTag();
                if(self._timelineMap[actionTag]) {
                    var timelines = self._timelineMap[actionTag];
                    for (var i=0; i<timelines.length; i++) {
                        var timeline = timelines[i];
                        timeline.setNode(child);
                    }
                }
            }
        }
start with node.
@param {cc.Node} target