* The client can use this to adjust the heartbeat frequency.
     *
     * @return the heartbeat interval in milliseconds
     */
    public long getHeartbeatInterval() {
        return heartbeatInterval;
    }

    /**
     * Sets the heartbeat interval.
     *
     * @param heartbeatInterval the heartbeat interval in milliseconds
     */

            if (message.isSuccess()) {
                // Set recommended heartbeat interval from server
                response.setRecommendedHeartbeatInterval(message.getHeartbeatInterval());
                log.debug("Witness heartbeat successful, next interval: {} ms", message.getHeartbeatInterval());
            } else {
                response.setError(message.getErrorMessage());