FlowTableManager implements AutoCloseable { protected FlowUtils getFlowUtils() { return flowUtils; } FlowTableManager(DataBroker dataProvider,
                            PacketProcessingService packetProcessingService,
                            PhyConfigLoader phyConfigLoader); @Override void close();  }
@Test public void testGetFlowUtils() throws Exception { FlowUtils flowUtils; Class<FlowTableManager> class1 = FlowTableManager.class; Method method = class1.getDeclaredMethod("getFlowUtils"); method.setAccessible(true); flowUtils = (FlowUtils) method.invoke(flowTableManager); Assert.assertTrue(flowUtils != null); }