@Get("/anyObjectWithJsonPublisher")
        @Streaming(true)
        @Produces(MediaTypeNames.JSON_SEQ)
        public Publisher<Object> anyObjectWithJsonPublisher() {
            return StreamMessage.of("anyObjectWithJsonPublisher");
        }
A mock service for testing {@link JacksonResponseConverterFunction}.
core/src/test/java/com/linecorp/armeria/internal/server/annotation/ResponseStreamingTest.java