static public function validateClientConfig(array $config)
    {
        $tags = [static::T8700, static::T8915, static::T8914];

        foreach ($tags as $tag) {
            if (!array_key_exists($tag, $config) || empty($config[$tag])) {
                throw new InvalidArgumentException("Please configure value for tag " . $tag);
            }
        }
    }