presto-8.x-2.2/modules/presto_contact/presto_contact.install

<?php

/**
 * @file
 * Install, update and uninstall functions for the prest_contact module.
 */

use Drupal\Core\Language\LanguageInterface;
use Drupal\menu_link_content\Entity\MenuLinkContent;
use Drupal\node\Entity\Node;

/**
 * Implements hook_install().
 */
function presto_contact_install() {
  // Create node.
  $node = Node::create([
    'type' => 'page',
    'title' => 'Contact Us',
    'langcode' => LanguageInterface::LANGCODE_NOT_SPECIFIED,
    'uid' => 1,
    'status' => 1,
    'promote' => 0,
    'field_fields' => [],
    'path' => [
      'alias' => '/contact',
    ],
  ]);
  $node->save();

  // Create pathauto alias.
  Drupal::service('pathauto.generator')
    ->updateEntityAlias($node, 'insert');

  // Create menu link.
  $menuLink = MenuLinkContent::create([
    'title' => 'Contact Us',
    'link' => [
      'uri' => "internal:/node/{$node->id()}",
    ],
    'menu_name' => 'main',
    'weight' => 20,
    'expanded' => TRUE,
  ]);
  $menuLink->save();
}