NotifierInterface.php

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

namespace Magento\Framework\Notification;

/**
 * Interface for notifiers
 *
 * Interface NotifierInterface
 *
 * @api
 * @since 100.0.2
 */
interface NotifierInterface
{
    /**
     * Add new message
     *
     * @param int $severity
     * @param string $title
     * @param string|string[] $description
     * @param string $url
     * @param bool $isInternal
     * @throws \Magento\Framework\Exception\LocalizedException
     * @return $this
     */
    public function add($severity, $title, $description, $url = '', $isInternal = true);

    /**
     * Add critical severity message
     *
     * @param string $title
     * @param string|string[] $description
     * @param string $url
     * @param bool $isInternal
     * @return $this
     */
    public function addCritical($title, $description, $url = '', $isInternal = true);

    /**
     * Add major severity message
     *
     * @param string $title
     * @param string|string[] $description
     * @param string $url
     * @param bool $isInternal
     * @return $this
     */
    public function addMajor($title, $description, $url = '', $isInternal = true);

    /**
     * Add minor severity message
     *
     * @param string $title
     * @param string|string[] $description
     * @param string $url
     * @param bool $isInternal
     * @return $this
     */
    public function addMinor($title, $description, $url = '', $isInternal = true);

    /**
     * Add notice
     *
     * @param string $title
     * @param string|string[] $description
     * @param string $url
     * @param bool $isInternal
     * @return $this
     */
    public function addNotice($title, $description, $url = '', $isInternal = true);
}