PluginBase provides create() factory method with autowired parameters

Classes that implement \Drupal\Core\DependencyInjection\ContainerInjectionInterface must provide a create() factory method to instantiate the object.

Now that services can be autowired, the PluginBase class has been extended with a generic version of the create() method suitable for most plugins with dependency injection.

Previously, a constructor and create() method would be something like this:

  public function __construct(
    array $configuration, $plugin_id,
    $plugin_definition,
    EntityTypeManagerInterface $entity_type_manager,
    BlockManagerInterface $block_manager
  ) {
    parent::__construct($configuration, $plugin_id, $plugin_definition);

    $this->entityTypeManager = $entity_type_manager;
    $this->blockManager = $block_manager;
  }

  public static function create(ContainerInterface $container, array $configuration, $plugin_id, $plugin_definition) {
    return new static(
      $configuration,
      $plugin_id,
      $plugin_definition,
      $container->get('entity_type.manager'),
      $container->get('plugin.manager.block')
    );
  }

Now it is possible to drop the create() method:

  public function __construct(
    array $configuration, $plugin_id,
    $plugin_definition,
    #[Autowire(service: 'entity_type.manager')]
    EntityTypeManagerInterface $entity_type_manager,
    BlockManagerInterface $block_manager
  ) {
    parent::__construct($configuration, $plugin_id, $plugin_definition);

    $this->entityTypeManager = $entity_type_manager;
    $this->blockManager = $block_manager;
  }

Make sure the plugin implements Drupal\Core\Plugin\ContainerFactoryPluginInterface to proceed with autowiring.

In simple cases, the service can be inferred from the interface name alone. If a service cannot be determined from the interface directly, an exception will be raised, and you can add the #[Autowire] attribute to specify the service ID.