function createAdjustedCollisionBox(box, adjustment) {
        return new CollisionBox(
            box.x + adjustment.x,
            box.y + adjustment.y,
            box.width,
            box.height);
    }
Adjust the collision box.
@param {!CollisionBox} box The original box.
@param {!CollisionBox} adjustment Adjustment box.
@return {CollisionBox} The adjusted collision box object.