@Override
            @Nullable
            public Endpoint selectNow(ClientRequestContext ctx) {
                return delegate.selectNow(ctx);
            }
Counts down a user provided counter each time an endpoint is selected asynchronously.
Once the countdown is complete, the user defined behavior is executed.
testing-internal/src/main/java/com/linecorp/armeria/internal/testing/CountDownEmptyEndpointStrategy.java