lightning_core-8.x-5.3/modules/lightning_contact_form/lightning_contact_form.module

<?php

/**
 * @file
 * Contains hook implementations for lightning_contact_form.
 */

use Drupal\contact\ContactFormInterface;
use Drupal\Core\Installer\InstallerKernel;
use Drupal\path_alias\Entity\PathAlias;

/**
 * Implements hook_ENTITY_TYPE_insert().
 */
function lightning_contact_form_contact_form_insert(ContactFormInterface $contact_form) {
  if ($contact_form->id() === 'sitewide' && InstallerKernel::installationAttempted()) {
    // Create an alias for the form if it's not already taken.
    $path = '/contact';
    $alias = Drupal::service('path_alias.manager')->getPathByAlias($path);
    if ($alias === $path) {
      PathAlias::create([
        'path' => '/contact/sitewide',
        'alias' => $path,
      ])->save();
    }
  }
}