/**
  * @param $configFolder
  * @throws \Exception
  */
 public function setConfigFolder($configFolder)
 {
     if (!$configFolder) {
         throw new \Exception('Empty config folder path');
     }
     $_configFolder = realpath($configFolder);
     if ($_configFolder != FALSE && is_dir($_configFolder) && is_readable($_configFolder)) {
         $this->_configArray = [];
         $this->_configFolder = $_configFolder . DIRECTORY_SEPARATOR;
         $ns = $this->app['namespaces'];
         if (is_array($ns)) {
             \GF\Loader::registerNamespaces($ns);
         }
     } else {
         throw new \Exception('Config directory read error:' . $configFolder);
     }
 }