class InstanceCertManager {

    void shutdown() {
        if (certScheduledExecutor != null) {
            certScheduledExecutor.shutdownNow();
        }
        if (sshScheduledExecutor != null) {
            sshScheduledExecutor.shutdownNow();
        }
    }

    public  InstanceCertManager(final PrivateKeyStore keyStore, Authorizer authorizer, HostnameResolver hostnameResolver,
            boolean readOnlyMode);

}