Laravel\Lumen\Concerns\RoutesRequests::parseAction PHP Метод

    protected function parseAction($action)
    {
        if (is_string($action)) {
            return ['uses' => $action];
        } elseif (!is_array($action)) {
            return [$action];
        }
        if (isset($action['middleware']) && is_string($action['middleware'])) {
            $action['middleware'] = explode('|', $action['middleware']);
        }
        return $action;
    }