Mail.php

<?php

namespace Drupal\Core\Annotation;

use Drupal\Component\Annotation\Plugin;

/**
 * Defines a Mail annotation object.
 *
 * Plugin Namespace: Plugin\Mail
 *
 * For a working example, see \Drupal\Core\Mail\Plugin\Mail\PhpMail
 *
 * @see \Drupal\Core\Mail\MailInterface
 * @see \Drupal\Core\Mail\MailManager
 * @see plugin_api
 *
 * @Annotation
 */
class Mail extends Plugin {
    
    /**
     * The plugin ID.
     *
     * @var string
     */
    public $id;
    
    /**
     * The human-readable name of the mail plugin.
     *
     * @var \Drupal\Core\Annotation\Translation
     *
     * @ingroup plugin_translatable
     */
    public $label;
    
    /**
     * A short description of the mail plugin.
     *
     * @var \Drupal\Core\Annotation\Translation
     *
     * @ingroup plugin_translatable
     */
    public $description;

}