devel_test.module

<?php


/**
 * @file
 * Helper module for devel test.
 */

/**
 * Implements hook_mail().
 */
function devel_test_mail($key, array &$message, array $params) : void {
    if ($key === 'devel_mail_log') {
        $message['subject'] = $params['subject'];
        $message['body'][] = $params['body'];
        $message['headers']['From'] = $params['headers']['from'];
        $message['headers'] += $params['headers']['additional'];
    }
}