ItemInterface.php

<?php
/**
 * Copyright © Magento, Inc. All rights reserved.
 * See COPYING.txt for license details.
 */
namespace Magento\TestModuleMSC\Api\Data;

interface ItemInterface extends \Magento\Framework\Api\ExtensibleDataInterface
{
    /**
     * @return int
     */
    public function getItemId();

    /**
     * @param int $itemId
     * @return $this
     */
    public function setItemId($itemId);

    /**
     * @return string
     */
    public function getName();

    /**
     * @param string $name
     * @return $this
     */
    public function setName($name);
}