rabbit_hole-8.x-1.x-dev/tests/modules/rabbit_hole_test_hooks/rabbit_hole_test_hooks.module

<?php

use Drupal\Core\Entity\ContentEntityInterface;

/**
 * Implements hook_rabbit_hole_values_alter().
 */
function rabbit_hole_test_hooks_rabbit_hole_values_alter(array &$values, ContentEntityInterface $entity) {
  if ($values['action'] === 'page_redirect') {
    $values['redirect'] = '<front>';
  }
}