def stopMostPreferredClient = new Transformer<List<WorkerDaemonClient>, List<WorkerDaemonClient>>() {
            @Override
            List<WorkerDaemonClient> transform(List<WorkerDaemonClient> workerDaemonClients) {
                return workerDaemonClients[0..0]
            }
        }

        when:
        3.times { manager.reserveNewClient(options) }
        [client1, client2, client3].each { manager.release(it) }