@Test
    public void onNext() {
        completeObserver.onNext(new Object());
    }
The Test Case For {@link CompleteObserver}.
shenyu-plugin/shenyu-plugin-proxy/shenyu-plugin-rpc/shenyu-plugin-grpc/src/test/java/org/apache/shenyu/plugin/grpc/proto/CompleteObserverTest.java