Snippets

/**
* Implements hook_preprocess_HOOK().
*/
function MYMODULE_preprocess_html(&$variables) {
 $variables['head_title']['title'] = 'new title';
}

/**
* Implements hook_entity_type_alter().
*/
function MYMODULE_entity_type_alter(array &$entity_types) {
 if (isset($entity_types['image_style'])) {
   $entity_types['image_style']->setClass(CustomImageStyle::class);
 }
}

// @phpstan-ignore-next-line

/**
* Implements hook_preprocess_HOOK().
*/
function MYMODULE_preprocess_file_video(&$variables) {
 if (isset($variables['files'][0]['source_attributes'])) {
   /** 

$node = $this->entityTypeManager()->getStorage('node')->load($nid);
if ($node) {
 $form = $this->entityTypeManager()->getFormObject('node', 'default')->setEntity($node);
 return $this->formBuilder()->getForm($form);
}

<?php

namespace Drupal\MYMODULE;

use Drupal\Core\DependencyInjection\ContainerBuilder;
use Drupal\Core\DependencyInj

/**
* Add new fields.
*/
function MYMODULE_update_10000() {
 $content_type = 'article';
 $csv_file_path = DRUPAL_ROOT .

$node = $this->entityTypeManager()->getStorage('node')->create(['type' => 'bio']);
return $this->entityFormBuilder()->getForm($node);

/**
* Implements hook_form_FORM_ID_alter().
*/
function MYMODULE_form_user_form_alter(&$form, FormStateInterface $form_state) {
 if ($form_state->getFormObject()->getOperation() === 'default') {
   // some code...
 }
}

my_custom.links.task.yml: