private function logger(&$commands, ClassMap $classMap, PersistentObject $object, $operation)
 {
     $logger = $classMap->getDb()->getORMLogger();
     if ($logger) {
         $description = $object->getLogDescription();
         $idMethod = 'get' . $classMap->getKeyAttributeName();
         $commands[] = $logger->getCommand($operation, $classMap->getName(), $object->{$idMethod}(), $description);
     }
     //return $command;
 }