@Override
    public List<String> resolve(List<String> names) {
      return Stream.generate(() -> "rack").limit(names.size()).collect(Collectors.toList());
    }
Class used to be the base of unit tests on load balancers. It gives helper methods to create maps
of {@link ServerName} to lists of {@link RegionInfo} and to check list of region plans.
hbase-balancer/src/test/java/org/apache/hadoop/hbase/master/balancer/BalancerTestBase.java