@Override
    public Flux<HelloReply> lotsOfRepliesWithoutScheduler(Mono<HelloRequest> request) {
        return request
                .flatMapMany(
                        it -> Flux.interval(Duration.ofSeconds(1))
                                  .take(5)
                                  .map(index -> "Hello, " + it.getName() + "! (sequence: " + (index + 1) + ')')
                )
                .map(TestServiceImpl::buildReply);
    }
Sends 5 {@link HelloReply} responses published without a specific {@link Scheduler}
when receiving a request.
it/grpc/reactor/src/test/java/com/linecorp/armeria/grpc/reactor/TestServiceImpl.java