code: @Override
      @Deprecated
      public ServiceInstance getInstance(String serviceName, String instanceId)
              throws ServiceException {
  
          ServiceInstanceUtils.validateManagerIsStarted(isStarted.get());
          ServiceInstanceUtils.validateServiceName(serviceName);
          ServiceInstanceUtils.validateServiceInstanceID(instanceId);
  
          ModelServiceInstance instance = getLookupService().getModelServiceInstance(serviceName, instanceId);
  
          if (instance!=null) {
              return ServiceInstanceUtils.toServiceInstance(instance);
          }
          return null;
      }
docs: {@inheritDoc}