Inventory group that consists of groups and hosts?

Hi

I'd like to define a group in my inventory that will include hosts as
well as some groups.

For instance I have this in my inventory:

[squid]
proxy-prod
proxy-uat
proxy-test

[testgroup]
squid
extrahost

If I run a playbook and use 'testgroup' for the hosts definition, I get:

[WARNING]: Found both group and host with same name: squid

If I change the inventory to use the children syntax:

[testgroup:children]
squid
extrahost

Then I get:

[testgroup:children] includes undefined group: extrahost

I can get this to work outside of the inventory, in my playbook:

  hosts:
    - squid
    - eventr-uat

But then this collection of hosts isn't available in the inventory,
and hence not to other roles etc.

Is it possible at all to have a 'mixed' group in the inventory?

Thanks

Dick

This should work

[squid]
proxy-prod
proxy-uat
proxy-test

[testgroup]
extrahost

[testgroup:children]
squid