CustomerPersistenceInterface.php

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

/**
 * Customer CRUD interface
 */
interface CustomerPersistenceInterface
{
    /**
     * Create customer
     *
     * @api
     * @param \Magento\Customer\Api\Data\CustomerInterface $customer
     * @param string $passwordHash
     * @return \Magento\Customer\Api\Data\CustomerInterface
     * @throws \Magento\Framework\Exception\InputException If bad input is provided
     * @throws \Magento\Framework\Exception\State\InputMismatchException If the provided email is already used
     * @throws \Magento\Framework\Exception\LocalizedException
     */
    public function save(\Magento\Customer\Api\Data\CustomerInterface $customer);

    /**
     * Retrieve customer by email
     *
     * @api
     * @param string $email
     * @param int|null $websiteId
     * @return \Magento\Customer\Api\Data\CustomerInterface
     * @throws \Magento\Framework\Exception\NoSuchEntityException If customer with the specified email does not exist
     * @throws \Magento\Framework\Exception\LocalizedException
     */
    public function get($email, $websiteId = null);

    /**
     * Retrieve customer by id
     *
     * @api
     * @param int $id
     * @param int|null $websiteId
     * @return \Magento\Customer\Api\Data\CustomerInterface
     * @throws \Magento\Framework\Exception\NoSuchEntityException
     * @throws \Magento\Framework\Exception\LocalizedException
     */
    public function getById($id, $websiteId = null);

    /**
     * Delete customer by id
     *
     * @api
     * @param int $id
     * @return bool
     * @throws \Magento\Framework\Exception\NoSuchEntityException
     * @throws \Magento\Framework\Exception\LocalizedException
     */
    public function delete($id);
}