private function __construct()
 {
     $this->initAutoload();
     $this->_appStructureConfig = AppStructureConfig::getInstance();
     $this->_appStructureConfig->setupConfig();
     $this->_router = new Router($this->_appStructureConfig->getAppStructure(), $this->_appStructureConfig->getActionsArray(), RoutingConfig::getCustomMappings());
     $this->_frontController = FrontController::getInstance($this->_router);
 }
 /**
  * This method returns custom defined routes that map to existing ones.
  * 'uri' key keeps the existing route
  * 'params' keeps the needed uri params to call the action.
  * See below for example.
  * @return array
  */
 public static function getCustomMappings()
 {
     return RoutingConfig::getCustomMappings();
 }