Comment 1 for bug 1836018

This appears to be used by the juju openstack provider in some way:
https://github.com/juju/juju/blob/fb537d3034cd713ab6b39e4cd14cb34eb40f96e2/provider/openstack/provider.go#L992

It may be that this needs to be cleaned up, but I suspect there is a bit of cross project untangling to be done before we make any changes to this.