@Streaming(true)
        @Produces(MediaTypeNames.APPLICATION_BINARY)
        @Get("/httpDataApplicationPublisher")
        public Publisher<HttpData> httpDataApplicationPublisher() {
            return StreamMessage.of(HttpData.ofUtf8("httpDataApplicationPublisher"));
        }
A mock service for testing {@link ByteArrayResponseConverterFunction}.
core/src/test/java/com/linecorp/armeria/internal/server/annotation/ResponseStreamingTest.java