@Override
    public DefaultServiceConfigSetters blockingTaskExecutor(
            BlockingTaskExecutor blockingTaskExecutor, boolean shutdownOnStop) {
        this.blockingTaskExecutor = requireNonNull(blockingTaskExecutor, "blockingTaskExecutor");
        if (shutdownOnStop) {
            shutdownSupports.add(ShutdownSupport.of(blockingTaskExecutor));
        }
        return this;
    }
A default implementation of {@link ServiceConfigSetters} that stores service related settings
and provides a method {@link DefaultServiceConfigSetters#toServiceConfigBuilder(Route, String, HttpService)}
to build {@link ServiceConfigBuilder}.
core/src/main/java/com/linecorp/armeria/server/DefaultServiceConfigSetters.java