Notify Group

Configuration
1

Hi,

How do I have to configure the group for the notification correctly?
As I did it does not work:

notify.yaml

- name: FireTV
  platform: nfandroidtv
  host: 10.10.1.100
  duration: 10
  
- name: FireTVStick
  platform: nfandroidtv
  host: 10.10.1.101
  duration: 10

- name: Nexus7
  platform: nfandroidtv
  host: 10.10.10.102
  duration: 30

- name: gruppe
  platform: group
  services:
    - service: nfandroidtv

Thank you
El Grande