FlowTableManager implements AutoCloseable { @Override public void close() throws Exception { if ( null != userVnPnMappingChangeListenerReg ) { userVnPnMappingChangeListenerReg.close(); } if ( null != flowUtils ) { flowUtils.close(); } } FlowTableManager(DataBroker dataProvider,
                            PacketProcessingService packetProcessingService,
                            PhyConfigLoader phyConfigLoader); @Override void close();  }
@Test public void testClose() throws Exception { flowTableManager.close(); Assert.assertTrue(flowTableManager != null); }