}
    }

    private LockableSftpClient acquireClient(SftpHost sftpHost) {
        return idleClients.containsKey(sftpHost) ? reuseExistingOrCreateNewClient(sftpHost) : createNewClient(sftpHost);
    }

    private LockableSftpClient reuseExistingOrCreateNewClient(SftpHost sftpHost) {
        List<LockableSftpClient> clientsByHost = idleClients.get(sftpHost);

        LockableSftpClient client = null;