/** * remove registrationId to a existing group * * >Note: if you remove all registrationIds the group is automatically deleted * * @param $notificationKeyName * @param $notificationKey * @param array $registeredIds registrationIds to remove * * @return null */ public function removeFromGroup($notificationKeyName, $notificationKey, array $registeredIds) { $request = new GroupRequest(self::REMOVE, $notificationKeyName, $notificationKey, $registeredIds); $response = $this->client->post($this->url, $request->build()); return $this->getNotificationToken($response); }