public function code_mirror_get_css_theme($parameters)
 {
     $am = new AssetManager();
     $am->set('theme', new FileAsset($parameters['theme']));
     $am->get('theme');
     #var_dump($am, $am->get('theme'), $am->getNames()); die;
     if (isset($parameters['theme']) and $theme = $this->assetManager->getTheme($parameters['theme'])) {
         return $theme;
     }
     return false;
 }