public function run()
 {
     $this->init();
     if (empty($this->_actionMethod)) {
         trigger_error('Action not defined in class ' . get_class($this) . '::run()', E_USER_ERROR);
         App::response()->sendNotFoundAndExit();
     }
     if (!method_exists($this, $this->_actionMethod)) {
         trigger_error('Action method "' . $this->_actionMethod . '" not exit in class ' . get_class($this) . '::run()', E_USER_ERROR);
         App::response()->sendNotFoundAndExit();
     }
     $this->{$this->_actionMethod}();
     if ($this->_doRender) {
         // if action method called render()
         return $this->view->render();
         // return rendered content
     } else {
         return $this->view->getData();
         // return all variables
     }
 }