Свой Handler для webform

<?php
namespace Drupal\fix\Plugin\WebformHandler;

use Drupal\webform\Plugin\WebformHandler\EmailWebformHandler;
use Drupal\webform\WebformSubmissionInterface;

/**
 * Emails a webform submission.
 *
 * @WebformHandler(
 *   id = "test_handler_email",
 *   label = @Translation("Test handler email"),
 *   category = @Translation("Notification"),
 *   description = @Translation("Sends a webform submission to a different email."),
 *   cardinality = \Drupal\webform\Plugin\WebformHandlerInterface::CARDINALITY_UNLIMITED,
 *   results = \Drupal\webform\Plugin\WebformHandlerInterface::RESULTS_PROCESSED,
 * )
 */
class TestEmailWebformHandler extends EmailWebformHandler {

  public function sendMessage(WebformSubmissionInterface $webform_submission, array $message) {
    $message['body'] = 'test';
    parent::sendMessage($webform_submission, $message);
  }
}