private function __construct($load_config = true)
 {
     if (!$load_config) {
         return;
     }
     $config = array('classmap_file' => vc_path_dir('APP_ROOT', 'vc_classmap.json.php'), 'shortcodes_dir' => vc_path_dir('SHORTCODES_DIR'), 'root_dir' => vc_path_dir('APP_ROOT'));
     if (is_file($config['classmap_file'])) {
         $config['classmap'] = (require $config['classmap_file']);
         self::$cached = true;
     } else {
         $config['classmap'] = self::generateClassMap($config['shortcodes_dir']);
         self::$cached = false;
     }
     self::$config = $config;
 }