getItem(itemPosition) {
        const items = $(this.rootElement).$$('.rainbow-rating_star');
        if (items[itemPosition]) {
            return new PageRatingStar(
                `${this.rootElement} .rainbow-rating_star:nth-child(${itemPosition + 1})`,
            );
        }
        return null;
    }
Returns a new Star page object of the element in item position.
@method
@param {number} itemPosition - The base 0 index of the star.