Automation trigger on any member of a group, is it possible?

Configuration
38

Your YAML anchor idea is great (for “static” groups)! Now I can:

group:
  my_group:
    entities: &my_group
      - sensor.aaa
      - sensor.bbb

automation:
  - trigger:
      - platform: state
        entity_id: *my_group
    action:
      - ...

# or where a list of entity ids are required:
    for_each: *my_group # for static groups this is the equivalent of '{{ expand("group.my_group") | map(attribute="entity_id") | list }}'