code: public void loadServiceEndpointsByServiceName(final Callback<List<EndpointDefinition>> callback,
                                                    final String serviceName) {
  
          loadServiceEndpointsByDNSService(callback, findDnsServiceName(serviceName));
      }
docs: Load the service nodes based on the internal service name.
  DB, Ingester, RadarAggregator, etc.
  
  @param callback    callback
  @param serviceName serviceName