@Override
    public DefaultServiceConfigSetters defaultServiceNaming(ServiceNaming defaultServiceNaming) {
        defaultServiceName = null;
        this.defaultServiceNaming = requireNonNull(defaultServiceNaming, "defaultServiceNaming");
        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