# File lib/vagrant-lxc/action/gc_private_network_bridges.rb, line 29
        def remove_bridges_that_are_not_in_use(env)
          env[:machine].config.vm.networks.find do |type, config|
            next if type.to_sym != :private_network

            bridge = config.fetch(:lxc__bridge_name)
            driver = env[:machine].provider.driver

            if ! driver.bridge_is_in_use?(bridge)
              env[:ui].info I18n.t("vagrant_lxc.messages.remove_bridge", name: bridge)
              unless ['lxcbr0', 'virbr0'].include? bridge
                driver.remove_bridge(bridge)
              end
            end
          end
        end