RPCNetworkParams getNetworkParams() {
        try {
            RPCNetworkParams networkParams = new RPCNetworkParams();
            if (mbusPort != -1) {
                networkParams.setListenPort(mbusPort);
            }
            return networkParams;
        } catch (Exception e) {
        }

        return null;
    }
Creates a source session params object with parameters set as these options
dictate.
vespaclient-core/src/main/java/com/yahoo/feedapi/FeederOptions.java