Prevent creation of network bridge

[apiening]

The current version of this role creates a network configuration for a bridge, when the bridge variable is defined. This makes sense on a clean setup / installation where OpenVPN should reside on its own bridge.
But in my setup, I already have a bridge setup on my host that is connected to internal virtual machines. I just want the OpenVPN tap device to be added to the existing bridge.
I was able to do this with previous versions of this role with a custom up and down script. But I can't upgrade to the newer version of this role without an option to prevent the creation and use of a new / different bridge.
As far as I understand, there is no way to prevent the network bridge setup?