@Get("/anyObjectWithJsonFuture")
        @Streaming(false)
        @Produces(MediaTypeNames.JSON)
        public CompletableFuture<Object> anyObjectWithJsonFuture() {
            return UnmodifiableFuture.completedFuture("anyObjectWithJsonFuture");
        }
A mock service for testing {@link JacksonResponseConverterFunction}.
core/src/test/java/com/linecorp/armeria/internal/server/annotation/ResponseStreamingTest.java