hook_event_dispatcher-8.x-2.04/modules/core_event_dispatcher/src/Event/Form/FormIdAlterEvent.php

<?php

namespace Drupal\core_event_dispatcher\Event\Form;

use Drupal\hook_event_dispatcher\Attribute\HookEvent;

/**
 * Class FormIdAlterEvent.
 */
#[HookEvent(id: 'form_id_alter', alter: 'form')]
class FormIdAlterEvent extends AbstractFormEvent {

  /**
   * {@inheritdoc}
   */
  public function getDispatcherType(): string {
    return 'hook_event_dispatcher.form_' . $this->getFormId() . '.alter';
  }

}