### Question:
ArkServiceContainer { public <T> T getService(Class<T> clazz) { return injector.getInstance(clazz); } ArkServiceContainer(String[] arguments); void start(); T getService(Class<T> clazz); void stop(); boolean isStarted(); boolean isRunning();  }### Answer:
@Test public void testGetService() { arkServiceContainer.start(); Pipeline pipeline = arkServiceContainer.getService(Pipeline.class); Assert.assertNotNull(pipeline); Assert.assertTrue(pipeline instanceof StandardPipeline); }