### Question:
QMUX extends QBeanSupport implements SpaceListener, MUX, QMUXMBean, Loggeable, MetricsProvider { public String getUnhandledQueue () { return unhandled; } QMUX(); void initService(); void startService(); void stopService(); void destroyService(); static MUX getMUX(String name); ISOMsg request(ISOMsg m, long timeout); void request(ISOMsg m, long timeout, ISOResponseListener rl, Object handBack); @Override void notify(Object k, Object value); String getKey(ISOMsg m); @Override Metrics getMetrics(); synchronized void setInQueue(String in); String getInQueue(); synchronized void setOutQueue(String out); String getOutQueue(); Space getSpace(); synchronized void setUnhandledQueue(String unhandled); String getUnhandledQueue(); @SuppressWarnings("unused") String[] getReadyIndicatorNames(); void addISORequestListener(ISORequestListener l); boolean removeISORequestListener(ISORequestListener l); synchronized void resetCounters(); String getCountersAsString(); int getTXCounter(); int getRXCounter(); @Override int getTXExpired(); @Override int getTXPending(); @Override int getRXExpired(); @Override int getRXPending(); @Override int getRXUnhandled(); @Override int getRXForwarded(); long getLastTxnTimestampInMillis(); long getIdleTimeInMillis(); void send(ISOMsg m); boolean isConnected(); void dump(PrintStream p, String indent);  }### Answer:
@Test public void testGetUnhandledQueue() throws Throwable { String result = new QMUX().getUnhandledQueue(); assertNull(result, "result"); }