docs: public MetadataQueryRRLoadBalancer getMetadataQueryRRLoadBalancer(
              ServiceInstanceQuery query) {
          for (MetadataQueryRRLoadBalancer lb : metaQueryLBList) {
              if (lb.getServiceInstanceQuery().equals(query)) {
                  return lb;
              }
          }
          MetadataQueryRRLoadBalancer lb = new MetadataQueryRRLoadBalancer(
                  lookupService, query);
          metaQueryLBList.add(lb);
          return lb;
      }