@Override
    default int getOrder() {
        return Ordered.LOWEST_PRECEDENCE;
    }
Return number of records held in this service registry. Provides default implementation so that implementations
needed this new functionality could override it and other implementations not caring for it could be left alone.

@return number of registered services held by any particular implementation
@since 5.0.0
api/cas-server-core-api-services/src/main/java/org/apereo/cas/services/ServiceRegistry.java