@Override
  public Map<String, Long> getMemstoreOnlyRowReadsCount() {
    Map<String, Long> map = new HashMap<>();
    map.put("info", 0L);
    return map;
  }
Get the replica id of this region.
hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/MetricsRegionWrapperStub.java