addNodes(nodes, options) {
    if (nodes) {
      // fx delay and sequence
      let sequenceSteps;
      let delay;
      if (options && !options.instant) {
        if (typeof options.delay !== 'undefined') {
          delay = options.delay;
        }
        if (delay) {
          sequenceSteps = [cc.delayTime(delay)];
        }
      }

      if (_.isArray(nodes)) {
        for (let i = 0, il = nodes.length; i < il; i++) {
          this.addNode(nodes[i], options, sequenceSteps);
        }
      } else {
        this.addNode(nodes, options, sequenceSteps);
      }

      if (sequenceSteps && sequenceSteps.length > 1) {
        this.runAction(cc.sequence(sequenceSteps));
      }
    }
  }
Shows nodes/sprites (note: does not create them, use NodeFactory to handle that!).
@param {Object|Array} nodes a single or array of nodes/sprites
@param {Object} [options] options object, 1 for all nodes