public function exists($path)
    {
        $keys       = $this->explode($path);
        $parameters = $this->parameters;

        foreach ($keys as $key) {
            if (!is_array($parameters)) {
                return false;
            }
            if (array_key_exists($key, $parameters)) {
                $parameters = $parameters[$key];
            } else {
                return false;
            }
        }
        return true;
    }