Request::hasSession PHP Méthode

        public static function hasSession()
        {
            //Method inherited from \Symfony\Component\HttpFoundation\Request
            return \Illuminate\Http\Request::hasSession();
        }

 function getValue()
 {
     if ($this->useOldValue && \Request::hasSession()) {
         return old($this->name, $this->value);
     } else {
         return $this->value;
     }
 }