public ServiceRequestContextBuilder defaultServiceNaming(ServiceNaming defaultServiceNaming) {
        this.defaultServiceNaming = requireNonNull(defaultServiceNaming, "defaultServiceNaming");
        return this;
    }
Sets the default naming rule for the {@link RequestLog#serviceName()}.
If set, the service name will be converted according to given naming rule.

@param defaultServiceNaming the default service naming.
core/src/main/java/com/linecorp/armeria/server/ServiceRequestContextBuilder.java