public VirtualHostBuilder defaultServiceNaming(ServiceNaming defaultServiceNaming) {
        this.defaultServiceNaming = requireNonNull(defaultServiceNaming);
        return this;
    }
Sets the default naming rule for the name of services. If not set, the value set via
{@link ServerBuilder#defaultServiceNaming(ServiceNaming)} is used.
core/src/main/java/com/linecorp/armeria/server/VirtualHostBuilder.java