/**
  * @return mixed
  */
 protected function _getIndexedTables()
 {
     if (($indexed_tables = Cache::read('Related.indexedTables')) === false) {
         $InRelatedIndexBehavior = new InRelatedIndexBehavior(TableRegistry::get(''));
         $InRelatedIndexBehavior->refreshCache();
         $indexed_tables = Cache::read('Related.indexedTables');
     }
     return $indexed_tables;
 }