role_with_module.yml

---
- hosts: demo
  gather_facts: no
  roles:
    - role_with_module

- hosts: linux
  gather_facts: no
  tasks:
    - mymod:
      register: res
    - debug:
        var: res.msg

- hosts: windows
  gather_facts: no
  tasks:
    - winmod:
      register: res
    - debug:
        var: res.msg