cocos2dx, get label from layer

I could keep label reference in a member variable, but I preferred to manage it in the layer structure. So far I found the only api to get children is layer->getChildByXxx.  They all return Node*. I get Label is descendant of Node as it can be added as a child of layer. So I did this.

label->setName("label");

// add the label as a child to this layer

this->addChild(label, 1);

and 

auto label = dynamic_cast<Label*>(this->getChildByName("label"));

It works so far. Correct me if there is a better way.