Regarding version mismatch.

[techguruCD]

Hi.
I've tried to use your source code on my PC but it doesn't work with many errors.
I think the version is different when you've committed between now and while the Cocos is updating, some functions are removed or some functions're added.

And I can't fix this problem.

`
_spawnPipe(){

    let pipeGroup = null;

    if (cc.pool.hasObject(PipeGroup)) {              // Cocos can't find 'hasObject'

        pipeGroup = cc.pool.getFromPool(PipeGroup);

    } else {

        pipeGroup = cc.instantiate(this.pipePrefab).getComponent(PipeGroup);

    }

    this.node.addChild(pipeGroup.node);

    pipeGroup.node.active = true;

    pipeGroup.init(this);

    this.pipeList.push(pipeGroup);

},

`

Please help me with this.
Great regards.
Colin