docs: public ModelServiceInstance getModelServiceInstance(String serviceName, String instanceId){
          ModelService service = getModelService(serviceName);
          if(service != null && service.getServiceInstances() != null ){
              for(ModelServiceInstance instance : service.getServiceInstances()){
                  if(instance.getInstanceId().equals(instanceId)){
                      return instance;
                  }
              }
          }
          return null;
      }