@Override
        public void streamingOutputCall(StreamingOutputCallRequest request,
                                        StreamObserver<StreamingOutputCallResponse> responseObserver) {
            responseObserver.onNext(StreamingOutputCallResponse.getDefaultInstance());
            responseObserver.onNext(StreamingOutputCallResponse.getDefaultInstance());
            responseObserver.onCompleted();
        }
This shows we can handle status that happens in trailers.
grpc/src/test/java/com/linecorp/armeria/client/grpc/protocol/UnaryGrpcClientTest.java