/**
 * Clones current Element structure.
 *
 * @returns {Element}
 */
cloneElement() {
    let clonedChildren = new Array(this._childElements.length);
    for (let i = 0; i < clonedChildren.length; i++) {
        clonedChildren[i] = this._childElements[i].cloneElement();
    }
    return new this.constructor(clonedChildren);
}