Slack\RealTimeClient::getGroupById PHP Méthode

    public function getGroupById($id)
    {
        if (!$this->connected) {
            return Promise\reject(new ConnectionException('Client not connected. Did you forget to call `connect()`?'));
        }
        if (!isset($this->groups[$id])) {
            return Promise\reject(new ApiException("No group exists for ID '{$id}'."));
        }
        return Promise\resolve($this->groups[$id]);
    }