protected function _addRoute($pattern, $paths = null, $method = null)
    {
        $route = new Route($pattern, $paths, $method);
        if ($method !== 'REST' && strpos($pattern, '{') === false) {
            $this->_simple_routes[$method][$pattern] = $route;
        } else {
            $this->_regex_routes[] = $route;
        }

        return $route;
    }