Adding Spine animation into cocos2d-x 3.10

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from: cocos2d-x 3.13 tests/cpp-tests/Classes/SpineTest/SpineTest.cpp

To add Spine animation into cocos2d-x 3.10:

#include <spine/spine-cocos2dx.h>

using namespace spine;

...
bool SpineTestPerformanceLayer::init() {
  if (!SpineTestLayer::init()) return false;
  scheduleUpdate();

  EventListenerTouchOneByOne* listener= EventListenerTouchOneByOne();
  listener->onTouchBegan= [this](Touch* touch, Event* event) {
    Vec2 pos= convertToNodeSpace(touch->getLocation());
    auto skeletonNode= SkeletonAnimation::createWithFile("spine/goblin.json", "spine/goblin.atlas", .6042f); // the scale .6042f affects atlas scale
    skeletonNode->setAnimation(0, "walk", true);
    skeletonNode->setSkin("goblin");
    skeletonNode->setScale(.2f); // this scales the resulting node
    skeletonNode->setPosition(pos);
    addChild(skeletonNode);
    return true;
  };
  _eventDispatcher->addEventListenerWithScreenGraphPriority(listener, this);
  return true;
}

Even the spine nodes are added with the touch, the number of draw call does not increase. It seems like the Spine nodes are automatically batch processed.