Is there any method to scale an entity or a bone of the entity?

Hello, I was working on some animations of some entities using the normal methods of set rotationangles but I would like to know if there is any way to scale the entity or some derivative of it, I found a method in the forum
"

public EntitySize getSize(Pose poseIn) {
        return super.getSize(poseIn).scale(0.5F, 0.5F);
    }
}

"
but I don't know what package it is in or if it is called from the constructor