code: @Override
      public ConfigurationAdmin getService(Bundle bundle, ServiceRegistration<ConfigurationAdmin> registration) {
          ServiceReference<ConfigurationAdmin> reference = registration.getReference();
          ced.setServiceReference(reference);
          return new ConfigurationAdminImpl(this, bundle);
      }
docs: /*
  (non-Javadoc)
  
  @see
  org.osgi.framework.ServiceFactory#getService(org.osgi.framework.Bundle,
  org.osgi.framework.ServiceRegistration)