/**

     * @param $class

     * @return mixed

     */

    public function mc_get_obj($class)

    {

        return \Magento\Framework\App\ObjectManager::getInstance()->get($class);

    }

 /**

     * TODO UPDATE

     * @return bool|mixed

     */

    public function update()

    {

        $customerId = $this->customerId;

        //fixme redirect login

        if (!$customerId) {

            //Todo @return not login

            $this->_die('not login', [], '/customer/account/login');

        }

        //fixme get request

        $req = $this->setReq()->req;

        $o = $this->_o;

        $data = $req[$o];

        /**

         * @var $quoteItem \Magento\Quote\Model\Quote\item

         */

        $quoteItem = $this->mc_get_obj('Magento\Quote\Model\Quote\item');

        //req item id

        $item_id = $req[$o]['item_id'];

        //GET Quote id

        $item = $quoteItem->load($item_id);

        //GET Quote id

        $quoteId = $item->getQuoteId();

        try {

            /**

             * @var $quote \Magento\Quote\Model\Quote

             */

            $quote = $this->mc_get_obj(\Magento\Quote\Model\Quote::class)->load($quoteId);

            $item = $quote->getItemById($item_id);

            if (!$item) {

                var_dump('Item is empty !');

                die;

            }

            $item->setSizeId($data['size_id']);

            $item->setSizeType($data['size_type']);

            $result =  $item->save()->toArray();

            $this->_die('Success !', [

                'size_id'=>$result['size_id'],

                'size_type'=>$result['size_type'],

            ], '', 1);

        } catch (\Exception $e) {

            $this->_die($e->getMessage());

        }

    }