What does 'Fetch full message' do on self-managed workspaces?

After reading the AdminGuide about PushMessages I wonder what the setting “Fetch full message content from the server on the receipt” does when not running a Enterprise Edition ? In my self-hosted workspace I can still toggle it. Does this mean I can use this feature?

No as far as I’m aware it only functions fully in the documented versions.

Not entirely sure why they left the toggle there.