eca-1.0.x-dev/modules/form/src/Event/FormSubmit.php

<?php

namespace Drupal\eca_form\Event;

/**
 * Dispatched when a form is being submitted.
 *
 * @internal
 *   This class is not meant to be used as a public API. It is subject for name
 *   change or may be removed completely, also on minor version updates.
 *
 * @package Drupal\eca_form\Event
 */
class FormSubmit extends FormBase {

}