protected function loadIdentsRight($mident, array $params, MappingSource $cfgLeft, $identLeft)
 {
     $allIdents = $this->folding->getAllIdents();
     switch ($mident) {
         case 'RUBRIC_2_SCCONTROLLERS':
             if ($this->folding instanceof ShowcasesCtrlManager) {
                 return array_diff($allIdents, $this->folding->getBaseControllerIdents());
             }
     }
     return $allIdents;
 }