/**
  * - load the error handling lib
  * - load utility libraries (not all but some thing that help the programmers life)
  * @return array
  */
 private static function utility()
 {
     self::log("Include autoload file.");
     require_once _base_ . '/lib/lib.autoload.php';
     self::log("Include log file.");
     require_once _base_ . '/lib/loggers/lib.logger.php';
     // config manager
     self::log("Include configuration file.");
     require_once _base_ . '/lib/lib.get.php';
     require_once Docebo::inc(_base_ . '/lib/lib.utils.php');
     // utf8 support
     self::log("Load utf8 management library.");
     require_once _base_ . '/addons/utf8/lib.utf8.php';
     // filter input
     self::log("Load filter input library.");
     require_once _base_ . '/lib/lib.filterinput.php';
     // yui
     self::log("Load yui library.");
     require_once _base_ . '/lib/lib.yuilib.php';
     // template
     self::log("Load template library.");
     require_once _base_ . '/lib/lib.template.php';
     // twig template engine
     $tplengine = Get::cfg('template_engine', array());
     if (array_key_exists('twig', $tplengine)) {
         self::log("Load twig template engine.");
         require_once _base_ . '/addons/twig/lib/Twig/Autoloader.php';
         Twig_Autoloader::register();
     }
     // mimetype
     self::log("Load mimetype library.");
     require_once _base_ . '/lib/lib.mimetype.php';
     require_once _lib_ . '/lib.acl.php';
     self::log("Prepare plugin's autoload.");
     if (Get::cfg('enable_plugins', false)) {
         PluginManager::autoload();
         $plugin_cfg = PluginManager::config();
         $GLOBALS['cfg'] = array_merge($GLOBALS['cfg'], $plugin_cfg);
     }
 }