sshd-core/src/main/java/org/apache/sshd/client/session/ClientConnectionServiceFactory.java [35:50]:
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        @Override
        public void addPortForwardingEventListener(PortForwardingEventListener listener) {
            throw new UnsupportedOperationException("addPortForwardingListener(" + listener + ") N/A on default instance");
        }

        @Override
        public void removePortForwardingEventListener(PortForwardingEventListener listener) {
            throw new UnsupportedOperationException(
                    "removePortForwardingEventListener(" + listener + ") N/A on default instance");
        }

        @Override
        public PortForwardingEventListener getPortForwardingEventListenerProxy() {
            return PortForwardingEventListener.EMPTY;
        }
    };
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sshd-core/src/main/java/org/apache/sshd/common/forward/DefaultForwarderFactory.java [34:49]:
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        @Override
        public void addPortForwardingEventListener(PortForwardingEventListener listener) {
            throw new UnsupportedOperationException("addPortForwardingListener(" + listener + ") N/A on default instance");
        }

        @Override
        public void removePortForwardingEventListener(PortForwardingEventListener listener) {
            throw new UnsupportedOperationException(
                    "removePortForwardingEventListener(" + listener + ") N/A on default instance");
        }

        @Override
        public PortForwardingEventListener getPortForwardingEventListenerProxy() {
            return PortForwardingEventListener.EMPTY;
        }
    };
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