@Override
    public DefaultServiceConfigSetters decorators(
            Iterable<? extends Function<? super HttpService, ? extends HttpService>> decorators) {
        requireNonNull(decorators, "decorators");
        for (Function<? super HttpService, ? extends HttpService> decorator : decorators) {
            requireNonNull(decorator, "decorators contains null.");
            decorator(decorator);
        }
        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