---
  - hosts: all
    gather_facts: yes
    roles:
      - role: ferrarimarco.virtualbox
        become: yes

---
  - hosts: all
    gather_facts: yes
    roles:
      - role: ferrarimarco.virtualbox
        become: yes
        virtualbox_apt_package: "virtualbox-5.2"

Install Virtualbox 5.2 by default
Install Virtualbox 5.2 by default
