How To Implement Module Defaults Groups For Custom Group Or Collection

This link
https://docs.ansible.com/ansible/latest/user_guide/playbooks_module_defaults.html

mentions a way to define a default for a group of modules such as aws, azure etc.

I have a namespace.collection of modules that I’ve written, these are custom modules and I’m wondering how to achieve this for my collection of modules.

For example. I’d like to always specify VAR1:SOME_VALUE to any task in the playbook using a module from my namespace.collection without writing it for every single task separately.

module_defaults:
group/MYNAMESPACE.MYCOLLECTION:
VAR1: SOME_VALUE

or some equivalent but I haven’t been successful so far.

Thanks
Dhiwakar

https://gist.github.com/s-hertel/725ecc719b5301e76c571aca58d39bd3