/**
* 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);
}
