function get_unindexed_posts()
 {
     if (!class_exists('SearchWPIndexer')) {
         return array();
     }
     add_filter('searchwp_index_chunk_size', array($this, 'posts_per_page'));
     $indexer = new SearchWPIndexer();
     $unindexed_posts = $indexer->find_unindexed_posts();
     remove_filter('searchwp_index_chunk_size', array($this, 'posts_per_page'));
     return $unindexed_posts;
 }