Implements hook_entity_info().
function action_entity_info(&$entity_info) {
$entity_info['action']['controllers']['form']['add'] = 'Drupal\\action\\ActionAddFormController';
$entity_info['action']['controllers']['form']['edit'] = 'Drupal\\action\\ActionEditFormController';
$entity_info['action']['controllers']['list'] = 'Drupal\\action\\ActionListController';
}