protected function explodeId(array $body)
    {
        if (isset($body['post_id'])) {
            $key = 'post_id';
        } elseif (isset($body['id'])) {
            $key = 'id';
        } else {
            return false;
        }

        return array_combine(['id', 'fbid'], explode('_', $body[$key]));
    }