protected function containerFactory($container, array $containerOptions = [])
    {
        $container = ucfirst(strtolower($container));
        $class     = __CLASS__.'_Container_'.$container;
        $file      = DOOZR_DOCUMENT_ROOT.'Service'.DIRECTORY_SEPARATOR.
                        str_replace('_', DIRECTORY_SEPARATOR, $class).'.php';

        include_once $file;

        return new $class($containerOptions);
    }