Wallmander\ElasticsearchIndexer\Model\Indexer::getIndexablePostTypes PHP Method

    public static function getIndexablePostTypes()
    {
        if (Config::option('index_private_post_types')) {
            return get_post_types();
        }
        return get_post_types(['exclude_from_search' => false]);
    }

 /**
  * Hooked on save_post. Called when a post is updated.
  *
  * @param int $postID
  */
 public static function actionSavePost($postID)
 {
     global $importer;
     // If we have an importer we must be doing an import - let's abort
     if (!empty($importer)) {
         return;
     }
     $post = get_post($postID);
     if (!in_array($post->post_status, Indexer::getIndexablePostStati())) {
         // The post is not indexable but might have been. Try to delete.
         $indexer = new Indexer();
         $indexer->deletePost($post->ID);
         return;
     }
     if (in_array($post->post_type, Indexer::getIndexablePostTypes())) {
         do_action('esi_before_post_save', $post);
         $indexer = new Indexer();
         $indexer->indexPost($post);
     }
 }